Price: $24.85

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Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers

Item # ML389DAT

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Retail:$29.31

Our Price: $24.85

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master lock trailer locks coupler - 1-7/8 inch 2 and 2-5/16 ball couplers
master lock trailer locks fits 1-7/8 inch ball 2 2-5/16
master lock trailer locks fits 1-7/8 inch ball 2 2-5/16 ml389dat
master lock trailer locks coupler surround - 1-7/8 inch 2 and 2-5/16 ball couplers
master lock trailer locks coupler fits 1-7/8 inch ball 2 2-5/16 - and couplers
master lock trailer locks coupler surround
master lock trailer locks surround ml389dat
master lock trailer locks surround ml389dat
master lock trailer locks fits 1-7/8 inch ball 2 2-5/16 surround ml389dat
master lock trailer locks fits 1-7/8 inch ball 2 2-5/16
master lock trailer locks coupler fits 1-7/8 inch ball 2 2-5/16 ml389dat
master lock trailer locks coupler
master lock trailer locks coupler surround

In Use/Installed

trailer locks master lock coupler in use
trailer locks master lock coupler surround - 1-7/8 inch 2 and 2-5/16 ball couplers
trailer locks master lock fits 1-7/8 inch ball 2 2-5/16 surround ml389dat
trailer locks master lock coupler fits 1-7/8 inch ball 2 2-5/16 ml389dat
trailer locks master lock coupler - 1-7/8 inch 2 and 2-5/16 ball couplers

Customer Photos

master lock trailer locks coupler fits 1-7/8 inch ball 2 2-5/16 ml389dat
master lock trailer locks coupler fits 1-7/8 inch ball 2 2-5/16 - and couplers
master lock trailer locks coupler fits 1-7/8 inch ball 2 2-5/16 ml389dat
master lock trailer locks coupler fits 1-7/8 inch ball 2 2-5/16 - and couplers
master lock trailer locks fits 1-7/8 inch ball 2 2-5/16 ml389dat
master lock trailer locks coupler fits 1-7/8 inch ball 2 2-5/16 ml389dat
master lock trailer locks coupler fits 1-7/8 inch ball 2 2-5/16 ml389dat
master lock trailer locks coupler fits 1-7/8 inch ball 2 2-5/16 - and couplers

  • Coupler Lock
  • Standard Coupler Lock
  • Master Lock
  • Fits 1-7/8 Inch Ball
  • Fits 2 Inch Ball
  • Fits 2-5/16 Inch Ball
  • Surround Lock
  • Keyed Unique
Keep your trailer safe from towaway theft with this universal coupler lock. Its tough frame fits in and around most 1-7/8", 2", and 2-5/16" ball couplers; and it has a bright red color and heavy-duty construction to deter theft. Lowest Prices for the best trailer locks from Master Lock. Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers part number ML389DAT can be ordered online at etrailer.com or call 800-298-8924 for expert service.



Master Lock Trailer Locks - ML389DAT

Keep your trailer safe from towaway theft with this universal coupler lock. Its tough frame fits in and around most 1-7/8", 2", and 2-5/16" ball couplers; and it has a bright red color and heavy-duty construction to deter theft.


Features:

  • Heavy-duty coupler lock deters trailer theft by preventing hookup
  • Large size and heavy weight defend against attempts to break or shatter lock
  • Wafer-tumbler lock mechanism resists picking and prying
  • 1-Piece housing slides to fit tightly around your coupler
  • Powder coat resists rust and corrosion
    • Red color provides a visible theft deterrent
  • Keyway cover protects lock from moisture and debris
  • 2 Keys included


Specs:

  • Application: most 1-7/8", 2" and 2-5/16" couplers
    • Fits standard lip, rolled lip, straight lip, surge brake, hammer blow, and UFP couplers
  • Limited lifetime warranty


Instructions for Locking the Trailer Coupler

  1. Insert key and turn clockwise to unlock.
  2. Pull the ball out from the lock body as far as it will go.
  3. Insert the ball of the lock into your coupler's ball socket.
  4. Push the lock body in so that it surrounds your coupler.
  5. Turn key counterclockwise to lock.


389DAT Master Lock Universal Trailer Coupler Lock - 1-7/8", 2" and 2-5/16"







Economy - This item

Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers


Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers
Master Lock Trailer Locks

234 reviews

Code: ML389DAT

In Stock

Retail:$29.31

Our Price: $24.85


  • Trailer Locks
  • Coupler Lock
  • Keyed Unique
  • Fits 1-7/8 Inch Ball
  • Fits 2 Inch Ball
  • Fits 2-5/16 Inch Ball
  • Standard Coupler Lock
  • Surround Lock
  • Master Lock


Keep your trailer safe from towaway theft with this universal coupler lock. Its tough frame fits in and around most 1-7/8", 2", and 2-5/16" ball couplers; and it has a bright red color and heavy-duty construction to deter theft.

more information →
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    • Keyed Alike
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    Protect just about any trailer from theft with this universal coupler lock, which uses a unique "ball" and shackle to fit a variety of coupler sizes and styles. Secures trailer when it is not in tow. Order multiple locks keyed alike.

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    Master Lock Heavy-Duty Coupler and Latch Lock Combo for 1-7/8", 2", 2-5/16" Couplers


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    • Steel


    Whether your trailer is being towed or being stowed, this rugged lock combo deters trailer theft. Heavy-duty steel coupler lock fully surrounds coupler when trailer is unhitched. Keyed-alike latch lock secures coupler to tow vehicle during transit.

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    Video of Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers


    Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




    Video Transcript for Master Lock Locks ML389DAT Review

    Today we're going to be taking a look at the Master Lock trailer coupler lock. This is a universal lock that's designed to fit most 1 and 7/8th inch, 2 inch, and 2 and 5/16th inch ball couplers. This is a heavy duty coupler lock that's going to deter trailer theft by preventing hookup. It's got a nice large size to it as well as the heavy weight. So it's going to defend against attempts to break or shatter the lock. It's going to use a wafer tumbler lock mechanism.

    That's going to resist picking and prying. It's also hard to duplicate keys that would fit a wafer tumbler lock mechanism. The key hole right here is easily accessible. We're looking at a one-piece housing. This portion right here is going to be the portion that slides to fit tightly inside the coupler. I'll explain it just a little bit here.

    Towards the end of the video, I'm actually going to show you how to install it on a coupler. So you want it in the open position. This is going to fit into the socket of the coupler. Then once you have it installed, you push these 2 pieces together. That's going to create the nice tight fit.

    This is the one piece housing so that's going to slide to fit around the coupler and provide that nice tight secure fit that we need to make sure that it's all the way secured and to fully prevent trailer hookup. We're looking at a powder coated steel construction. It's going to do a great job at resisting rust and corrosion and lasting a long time. The red color is going to provide a visible theft deterrent, so in most cases, when a thief sees a lock installed, they don't even bother with it. So this is red in color and it's easily visible, and it lets people know right away that your trailer is hooked up and they're not going to go anywhere with it. So it's a really nice design. Over the key slot, we're going to have a key way cover.

    That's going to protect the lock from moisture and debris. You're going to get 2 keys with a part number, and you're going to get one trailer coupler lock. Again this is designed to fit most 1 and 7/8th inch, 2 inch, and 2 and 5/16th inch couplers. It's going to fit standard lip, rolled lip, straight lip, surge break, hammer blow, and UFP couplers. With a maximum coupler width of 3 and one quarter of an inch. So be sure that the coupler width does not exceed that measurement. This is covered with a limited lifetime warranty. Now when installing this, it's a very simple installation. You want to make sure this is in the unlocked or open position. Place it into the socket on the coupler. I'm going to go and close the latch on mine. These 2 pieces slide together. Then I simply move it to a locked position. Then it's not going to go anywhere. It's fully secured and installed. Now you can see that it will rotate like that. But that does not give it any space to come off of the actual socket area. Removing it is also very simple. Place the key back in the key slot. Move it to the unlocked position. Pull it away, and it's going to drop right out. That's going to do it for today's look at the Master Lock trailer coupler lock.


    Customer Reviews

    Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers - ML389DAT

    Average Customer Rating:  4.8 out of 5 stars   (234 Customer Reviews)

    Keep your trailer safe from towaway theft with this universal coupler lock. Its tough frame fits in and around most 1-7/8", 2", and 2-5/16" ball couplers; and it has a bright red color and heavy-duty construction to deter theft.

    - ML389DAT

    by:


    I received the Master Lock Trailer Coupler Lock that I ordered. It was delivered in just a few days just a it was supposed to. It is exactly what I was looking for. It will help detour anyone from stealing my trailer ! I am extremely happy with the lock and etrailer ! I think this is a great company with great pricing on there products ! I will recommend them to everybody and will be ordering with them again real soon ! It was an easy and excellent experience. Great customer service too ! Thanks etrailer ! 298258



    - ML389DAT

    by:


    I feel much better about parking my trailer on the street with this lock on the hitch. Not only does it lock up the hitch securely but the bright red color signals to prospective thieves that this trailer cannot be towed. It is easy to attach and easy to remove. Also very compact so it can be stored easily. The shipping time was less than I expected. etrailer.com is my goto supplier for my trailer accessories. 467210



    - ML389DAT

    by:


    This is a terrific design since unlike padlocks, can't easily be cut with bolt cutters. I like the bright red color which tells a thief there is a lock to deal with from a distance. I think someone who wants your trailer can probably defeat any system you use, so the goal is to make it tough as possible and I think this lock does that. 287555



    - ML389DAT

    by:


    We have two vintage trailers. The first one is a 1948 Spartan Manor, we haven't tried the lock on it yet, and the other is a 1958 Aloha which I put the lock on it and it fit like a glove! It was really easy to put on too, so I think it should fit the Spartan just fine also. We got one for each trailer. We like the color for two reasons, one, being red, you can see it clearly, less chance of running into the front of the trailer. Two, it lets thieves know there is a lock on the trailer, and it wont be easy to steal without making a lot of noise. We were pleasantly surprised when the lock came and found it so well made. It's not light or wimpy at all. We're very happy! Thanks for the peace of mind. 238293



    - ML389DAT

    by:


    This lock does a good job of denying access to the trailer hitch ball so that the trailer is less easily stolen. However, an inventive thief could still chain to the hitch and tow the trailer away unless the wheels are somehow locked against rotation. This is a good initial safety measure and works well as intended to deny access to the hitch ball. The only issue I have seen is that the cover quickly faded to pink color in the sun and is no longer bright red - only a cosmetic issue. 409492



    - ML389DAT

    by:


    This 'Master Lock' is a great item in added protection for my modified cargo trailer. We all work hard in keeping what is ours' ours. There's always that impulse for those shady individuals out there in breaking a simple lock in taking your hard earned items. This Master Lock looks very durable and notable in given them second thoughts. Thanks' George J. For a quality item' great shipping and packaging. Will highly recommend "etrailer" to new friends I meet on the road. Regards' RG 238081



    - ML389DAT

    by:


    This master lock trailer coupler fits my camper tongue perfectly and is easy to install, remove and store. The red coated steel body is heavy, solid and secures the tongue against thief as stated in the directions. I like the red powder coating for its visibility, as well. The key well is water and dust proof and stands up to those adverse conditions. This is a must for securing any trailer, any where, any time. The price is fair and the lowest I found anywhere. 273905



    - ML389DAT

    by:


    I ordered multiple items, Trailer Wheel Covers, Trailer Tie Downs, Trailer Tire Chocks, Trailer Ball Lock and Wench Recovery Kit. Everything was delivered as expected. The entire team was courteous and very communicative with items which were back ordered.They waived shipping on the back ordered items, while allow me to add to the second shipment. Thanks for the awesome consumer experience. I will definitely be ordering from you guys soon!!! 399269



    - ML389DAT

    by:


    Nice lock. It’s nice that there is nothing to really cut on it. Latches on nice and strong. Easy to use. You could even use a default latch lock with it. Hope it holds up as good as it looks. Will review again after awhile. 438163



    - ML389DAT

    by:


    This lock was chosen by me for medium security of our 20' boat. I was installed easily and will keep most who want to try to steal something like our boat away. If they really wanted to, a sledge would destroy this. Where there's a will there's a way. For our 31' trailer, I opted for another model. That would take a lot more beating to 'maybe' get off the hitch. It also costs about 8 times as much though... 421763



    - ML389DAT

    by:


    This trailer locking device is heavy duty, well constructed, and coated to protect any painted surfaces. This improves the security of my boat trailer when not in use. Using a regular lock through the trailer tongue clamp down hasp is not a sure way to secure the trailer when the ball receiver is still is exposed, and can still be used with a smaller ball, etc. This Master Lock device solves that problem. 460674



    - ML389DAT

    by:


    etrailer.com rocks!!! Ordered this item and needed it in 2 days in order to take on my trip. I messed up the address on my order, and was concerned it would not get here in time. etrailer.com automatically fixed my error, and I received it in 2 days. You guys are so efficient. Great service, great product! You guys should be running Washington. We need competency there in the worst way. 274389



    - ML389DAT

    by:


    Nice lock and fit my small trailer nicely. It looks like the coating should last as I have the trailer in a coastal region that the last lock (different brand) lasted about a year before the plating was rusted. One of my other boat trailers has a Master lock on it that has been on it for 9 years with no rust, unfortunately that model wouldn't fit the small trailer. 265280



    - ML389DAT

    by:


    Fortunately no one has ever tried to pry it off or otherwise remove it, but maybe that's because it's a visible deterrent. I like the ease of application, and the locking mechanism works well. The only minor issue is the color seemed to fade in the hot Texas sunlight pretty quickly. But by all accounts, it's working as it was advertised. 409325



    - ML389DAT

    by:


    We received 10" of snow so I have not tried this on the trailer yet, but I have a new unused coupler that it fit perfect I will be ordering more of these for myself as these are Christmas gifts. Sierra H. was easy to work with and was very concerned that I got the correct product. Thanks to her and etrailer !! Happy Holidays to all!! 323028



    - ML389DAT

    by:


    Have used these before and they are excellent. Easy to use, compact and provide good security. My older one is chrome and I hope this color (red) is as durable as the chrome. Was glad to find them at ETrailer, ordering was easy and quick and the product arrived within 5 days. Will recommend this product and ETRAILER to my friends. 422181



    - ML389DAT

    by:


    With drive off trailer theft going up in our area I had to find a way to protect my cargo trailer that was easy for me to apply and tuff for some would be thief to get past. BINGO this coupler lock is just the ticket, it slips on in a jiff and blocks the coupler from being used. The best part is it’s a Master Lock and tuff as nails. 267141



    - ML389DAT

    by:


    A determined thief will defeat just about any kind of locking device. That being said, even the most aggressive thief will have a hard time with this product. Compared to the other types that use softer materials, this thing is built like a tank. This locking device inspires a lot more confidence than the one it will be replacing. 405570



    - ML389DAT

    by:


    Great device. I have historically used a couple of other coupler locks over the years and this is the best yet. Was a little skeptical when I ordered it as I have multiple trailers with multiple hitches but this one fit all three I tried last night - an more snugly than the other "yellow" brand I normally default to 301755



    - ML389DAT

    by:


    Had bought another type of lock for my concession stand trailer but it would fall right off. Did a google search and found This awesome lock! The video is what sold me! excited when it arrived and fit like a glove! Perfect lock and perfect fit! The lock was delivered fast and was able to secure my property safely! 389277



    - ML389DAT

    by:


    This should deter most anyone that want to try and break it. Fits nice and works well. In the end there are two bolts holding on the coupler so if someone was really determined they could remove the coupler. I'm very happy with this and the bright color that should deter all but the most determined thief. 399963



    - ML389DAT

    by:


    Trailer lock arrived, & installed on my boat trailer just as etrailer said it would. I wasn't in a hurry & used the standard shipping which got the lock to me in just a few days. etrailer shipped the same day as the order. Looks like a solid lock, & the red color makes it very easy to spot. 422272



    - ML389DAT

    by:


    My contact via email with customer service department was a pleseant surprise as they responded quickly and was very helpful. I received the 2 items that were ordered for our travel trailer in a very timely manner. I will definitely use etrailer again for any of my trailer needs. 405919



    - ML389DAT

    by:


    I just received the coupler lock today so its to soon to write about quality other than it is heavy and seems to be built well. The shipping from etrailer is very quick, paid extra for the three day delivery and it was on time. I've attached it to my 2 5/16" coupler and it fit great. 388082



    - ML389DAT

    by:


    I have had a trailer stolen with the ball latch locked open so when I saw this hitch lock I bought it to try. No one has been able to get by it yet. And the nice thing is it really does secure multiple size hitches without extra parts or fuss. The price was very reasonable too! 466111



    - ML389DAT

    by:


    I have installed the lock on my snowmobile trailer which is in a unprotected lot, but could stand to be a little tighter. Seems just a little loose, although this is my 1st one installed maybe this is the way their supposed to fit. I actually bought two as the idea is great. 463520



    - ML389DAT

    by:


    Very heavy cast iron construction paired with it's practical design make this the exact product we were looking for to secure our travel trailer while in storage. I prefer this over a competitor's product because I feel the design makes it harder to remove by a thief. 294548



    - ML389DAT

    by:


    I ordered the trailer locks on line about 7pm. Got an email saying it was out of stock. Few minutes later got a phone call from etrailer saying they would ship it as soon as they come in stock. I thought that was great follow up and customer service. 462161



    - ML389DAT

    by:


    I’m very happy with this lock. It’s heavy but still easy to use and lock into place. For my trailer a thief would bend or brake the hitch before getting this lock off. Also the ETRAILER company is great to work with, knowledgeable and friendly. 453033



    - ML389DAT

    by:


    Thanks for making the order process easy to understand and complete. The delivery was made in a fast and the product was exactly what I needed, ordered and wanted. Thank you and I will definitely order additional products from your company. 337288



    - ML389DAT

    by:


    The trailer lock I ordered came as noted. Very pleased with the fit on my dump trailer. I feel safe with that on now. I only gave it 4 stars because no one has tryed to break it off yet and and not sure if they can. Very Pleased 458436



    - ML389DAT

    by:


    This lock is very easy to use. Will fit all your standard ball sizes. And looks like it would be very difficult to defeat. I just got this so I can't speak to the longevity or how it handles winter weather but so far so good. 461544



    - ML389DAT

    by:


    So far so good ,easy to put on and I think this is a great deterrent to would be thieves . Of course if they really want your trailer they will get it ,but this will stop and make them think twice . I would buy again . 407287



    - ML389DAT

    by:


    Got one for insurance purposes. It does go on my boat trailer coupler, but could stand to be a little tighter. Seems just a little loose, although this is my 1st one maybe this is the way their supposed to fit. 395516



    - ML389DAT

    by:


    The above (new) Master Lock Universal Coupler Lock, is a upgrade to the current coupler lock that I currently have on my 4x6 Utility trailer, also, it will be a lot easier to lock/unlock the new coupler! Thanks! 421801



    - ML389DAT

    by:


    very simple. nice and bright . nothing is full proof but this seems like a good deterrent especially since it doesn't seem to have a place for thieves to use bolt cutters like some of the other options i've seen. 267975



    - ML389DAT

    by:


    Purchased to secure my new trailer in an unsecured lot. Item easy to use. Good as a short term deterrent but not fully secure. Others on the market that are indestructible, but hey, you get what you pay for. 318238



    - ML389DAT

    by:


    This is a heavy-duty lock that also serves to deter thieves with its bright red appearance. The price was very reasonable and the lock actually arrived early. Thanks etrailer! You'll be hearing from me again. 236875



    - ML389DAT

    by:


    Recently bought the Masterlock coupling lock; it is well made, easy to install/uninstall, and we will be testing it this weekend, as I have to leave my trailer alone in a motel parking lot... FOR THE WEEKEND! 342155



    - ML389DAT

    by:


    Waiting on trailer to use this product, but very impressed by the quality of operation. As far as shipping-WOW! I got the product in two days. Hally was fantastic! Keep up the great customer service! 238630



    - ML389DAT

    by:


    im retired from law enforcement and have seen EVERYTHING stolen so this lock is another layer of defense from the bad guy. It works very easily, is strong and with it being red, it is quite a deterrent. 247257



    - ML389DAT

    by:


    im retired from law enforcement and have seen EVERYTHING stolen so this lock is another layer of defense from the bad guy. It works very easily, is strong and with it being red, it is quite a deterrent. 247256



    - ML389DAT

    by:


    I bought this for my snowmobile trailer. It works well an I am very happy with it. It fits firmly into my 2" ball. The red is highly visible and lets me know that its installed in the trailer tongue. 320673



    - ML389DAT

    by:


    I ordered the Master Lock universal trailer coupler lock and it arrived in a short time. The construction is heavy duty. I replaced a padlock on the coupler. I feel the trailer is more secure now. 465954



    - ML389DAT

    by:


    My wife said it must work pretty good because we still have the trailer. It's true it does do what it is supposed to. I would have given it 5 stars but the paint on the lock fades pretty fast. 419359



    - ML389DAT

    by:


    Ordered the product and received it a day ahead of the scheduled delivery date. It certainly is what I ordered. Did also receive an email to let me know the order was processed. Good service. 279256



    - ML389DAT

    by:


    The product was a perfect fit. Looks like a great security measure, I am adding an additional component. My purpose is to make theft of my trailer look like its too much trouble to undertake. 430588



    - ML389DAT

    by:


    Locks it up tight so I don't have to worry about the local goons taking my trailer. It's a shame you have to lock everything up these days. If it's not set in concrete people will steal it. 403190



    - ML389DAT

    by:


    Excellent customer service. We ordered two initially and were so impressed ordered two more. Great quality lock for a reasonable price. Delivery in two days as promised. Thank you. 434759



    - ML389DAT

    by:


    Got my Lock today and will install it on a Jayco travel trailer on Sat. This lock will work on my ATV Trailer, Bobcat Trailer, and my Utility trailer. Its a perfect lock for any trailer. 229619


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    Ask the Experts about this Master Lock Trailer Locks
    Do you have a question about this Trailer Lock?


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    • We have coupler locks that can be keyed alike which are very similar to the MasterLock # ML389DAT, though unfortunately it cannot be keyed alike. The Fastway Universal Trailer Coupler Lock # DT25013KA can though, and like the MasterLock it works with 1-7/8", 2" and 2-5/16" couplers, and A-frame, straight channel, round tongue, flat plate and surge-type couplers. This coupler lock has been rated impressively high by a pretty large sample size of customers, with 311 reviewers leaving an...
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    • Your 2011 Honda Pilot that will be towing your new camper trailer through mountainous terrain in the Rockies will certainly benefit from some performance enhancements. A simple friction anti-sway bar like # 83660 can help with crosswinds and air blasts from passing trucks. These are inexpensive and simple to install; their tension is also adjustable. You just need to use a 2-inch bracket # RP26003 on your ball mount to provide a mounting point for the included ball. Note that this type...
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    • Construction of Master Lock # ML389DAT Coupler Lock
    • The Master Lock # ML389DAT trailer coupler lock is constructed of powder coated steel. If you click the provided link, you can see a product demonstration video. As you can see by its rating, the folks who've purchased the lock are happy with it.
      view full answer...

    • Recommended Trailer Coupler and Trigger Lock
    • If the Fastway Universal Coupler Lock for 1-7/8", 2" and 2-5/16" Couplers - Key 312, # FA86-0015-312, coupler is not snug, it may not be installed correctly. I've attached a video review for you to check out and make sure. If it is installed correctly and still doesn't meet your needs, then I recommend a different style of coupler lock like the Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers, # ML389DAT. You may also be interested in a trigger lock like the Master...
      view full answer...

    • Material of the Master Lock Coupler Lock part # ML389DAT
    • The Master Lock Coupler Lock part # ML389DAT that you referenced is made of steel. It is basically the red powder coated version of the older Master Lock 379ATPY.
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    • Can an Order for Multiple Tow Ready Locks Be Keyed the Same
    • Many of the lock products we offer can be ordered in multiples that are keyed alike and some of the Tow Ready brand locks are among these. The link at right will take you to our main page for locks that can be keyed alike. These include both surround locks like # ML389DAT and latch locks like the DeadBolt # 28012. You can use the filters on the linked page to select the type of locks you need - gooseneck, lunette ring, standard coupler, etc. Once you select the product you want you...
      view full answer...

    • Trailer Coupler Lock for 1-7/8, 2, and 2-5/16 Inch Couplers that Can be Keyed Alike
    • Unfortunately, the two locks you asked about cannot be ordered keyed alike or rekeyed but I do have some options for you. We have some trailer coupler locks that can be ordered in multiple quantities and keyed alike and will fit a 1-7/8, 2, and 2-5/16 inch couplers. The Blaylock EZ Lock Trailer Coupler Lock # BLTL-33-40D is one. It uses a heavy-duty bracket that fits around the coupler. Another option is the Fastway Universal Coupler Lock # FA86-0015-312 which is ordered with the...
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    • Would the Master Lock Trailer Coupler Lock # ML389DAT Fit an Interstate Cargo Trailer
    • I looked up some pictures of the couplers that are on Interstate cargo trailers and the Master Lock Trailer Coupler Lock # ML389DAT that you referenced would fit the couplers and would work well. I attached a review video for this lock for you to check out as well.
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    • Trailer Coupler and Wheel Locks to Deter Trailer Theft
    • master Lock trailer coupler lock # ML389DAT would be a bit more secure than lock # 377DAT in my opinion because it would be a little more difficult to pry off. When it comes to locks the best solution is redundancy. In other words more than one lock. You may want to consider also adding a wheel lock such as # RA-25 or # WI490. If a thief sees a coupler lock and a wheel lock they are likely going to move on to an easier target.
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    • Trailer Coupler Lock Compatible with Multi-Fit Ball Coupler
    • The Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers # ML389DAT will work with the Titan Zinc-Plated Brake Actuator w/ Lockout Shield - Disc - Multi-Fit Ball - Bolt On - 7,000 lbs # T47457107K. I recommend setting the multifit coupler for the largest hitch ball setting prior to adding the lock so it will not be removable when loosening the ball connection.
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    • Construction of Master Lock # ML389DAT Trailer Coupler Lock
    • The Master Lock # ML389DAT is constructed of steel, as opposed to pot metal. Pot metal is an alloy made of non-ferrous metals with low melting points like zinc, lead, copper, tin and aluminum. The lock wouldn't shatter or crack if struck by a hammer, unless extraordinary means like liquid nitrogen were used on the lock first. Although just about any lock can be defeated by a determined criminal if they are motivated enough and have enough time, the rugged construction of the # ML389DAT...
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    • Coupler Lock for Titan Brake Actuator With 2-5/16
    • There is a coupler lock for your Titan Brake Actuator # T2477600 with a 2-5/16" ball. The Master Lock # ML389DAT uses a 1-piece housing to fit securely around the coupler, has a powder coat to resist corrosion and comes with a pair of keys. I've added a photo showing how it looks on a Titan coupler and also linked a couple video reviews for you to take a look at.
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    • Locks for A-Frame Trailer Coupler
    • We have all sort of trailer locks including coupler locks for a-frame trailer couplers. Please refer to the linked page that displays all standard coupler locks. You can use a universal-fit surround-type lock such as # ML389DAT which fits all ball sizes and that prevents someone from hitching to your trailer by clocking access to the coupler, or a simple latch type lock like # RC6 that prevents the coupler latch (like the one on # CA-5400-B) from being lifted to unlock the coupler.
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    • Titan Model 60 With Lockout for Drum Brakes
    • Titan offers a bolt-on Model 60 with Lockout, # T4339720, for trailers with drum brakes. It works with trailers that have a 3" wide channel tongue and a 6,000 lb. weight capacity. I've attached a link to our article on trailer couplers as a courtesy. I also recommend purchasing a coupler lock like # ML389DAT to secure trailer and boat when not hitched to your vehicle.
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    • Key Replacement for ML389 DAT
    • You would need the part # MLK1. On the product page you would then need to enter the key number you need and we will ship you out the correct key.
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    • Trailer Coupler Lock for a Coupler with Large Lip
    • You can use Master Lock # ML389DAT for coupler # CTA-280. Another option is to use a latch lock so that the latch cannot be opened. Most latches, if they can accept a lock, will take a 1/4 diameter pin such as # 28012 or # 3008.
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    • Recommended Trailer Coupler Lock for a 2-5/16
    • I want to start off by saying that any trailer lock that you purchase will never be able to fully secure your trailer from a thief. If they are determined enough to bring equipment with them to remove a lock then given enough time they will be able to remove a lock. This will be the case no matter what you what you are looking to put a lock on. With that being said, the Blaylock EZ Lock Trailer Coupler Lock # BLTL-33 that you referenced is a great lock that has received many great reviews...
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    • Can the Master Lock Trailer Coupler Lock # ML389DAT be Keyed Alike
    • I do have a solution for you, but the Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers # ML389DAT that you referenced does not have the option to order the locks so that they are keyed alike. For a coupler lock that fits 1-7/8", 2" and 2-5/16" couplers and can be keyed alike I recommend going with the Fastway Universal Trailer Coupler Lock # DT25013KA. This is one of our most popular coupler locks and has received excellent reviews from customers. You will just...
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    • Multiple Locks for a 2-5/16 Inch Coupler that Can Be Keyed Alike
    • Unfortunatley, the Master Lock Trailer Coupler Lock # ML389DAT cannot be keyed alike. But I do have an option that may work for you. The Fastway Universal Coupler Lock # FA86-0015-303 uses the specifc 303 key code and can be ordered in multiple quantities. There a number of options of different key codes available for you to choose from and any will fit a 2-5/16 inch coupler.
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    • Recommended Trailer Coupler Lock Able to be Keyed Alike
    • The MasterLock Trailer Coupler Lock # ML389DAT is not able to be keyed alike. For a MasterLock option that can be keyed alike, you can use # 377DAT. For the most versatile keyed alike trailer coupler lock, I recommend the Fastway Universal Trailer Coupler Lock # DT25013KA. This coupler lock uses a bar to surround the coupler and fill the hitch ball hole. It is able to be keyed alike by simply selecting the keyed alike drop box option and then entering the quantity desired. It also...
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    • Coupler Lock Recommendations for etrailer Adjustable Channel Mount Coupler # CTA-280
    • You have some options to use a lock on coupler # CTA-280. First, you could use a latch lock, # RC1. Its diameter is slightly less (9/32 inches) than the pin hole diameter for the latch (5/16 inches). Another option is # ML389DAT which works with many styles of couplers and would be a great option for your coupler. I have linked videos of both locks for you.
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    • Recommended Coupler Lock that is Keyed Alike
    • I do have a solution for you, however the Master Lock Trailer Coupler Lock # ML389DAT referenced in your question cannot be keyed alike. For a similar option that can be keyed alike, I recommend looking at the Fastway Universal Trailer Coupler Lock # DT25013KA. Like the Master Lock product you were looking at, this coupler lock is compatible with 1-7/8 inch, 2 inch, and 2-5/16 inch couplers. It features an anti-drill pin to discourage attempts to drill out the lock and a bolt-blocked...
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    • Coupler Lock and Secuirty for Bolt-On A-Frame Coupler
    • When using a bolt-on coupler such as the Bulldog # BD44150WH301, trailer coupler locks such as the Master Lock # ML389DAT are added to prevent trailer theft. These locks are an inexpensive and large deterrent to those looking to steal a trailer. There is no absolute way to prevent theft of a coupler if somebody was determined enough, but it would be extraordinarily unusual for someone to go through the amount of time, trouble, and risk of unbolting a coupler for the purposes of taking the...
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    • Recommended Keyed Alike Trailer Coupler Lock for 3 Key Matching Trailer Locks
    • The Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers # ML389DAT do not have a keyed alike feature so unfortunately I can't guarantee 3 of these keyed alike. If you are interested in a coupler lock with the keyed alike option, I recommend the Fastway Universal Trailer Coupler Lock for 1-7/8", 2" and 2-5/16" Couplers # DT25013KA. This is a very versatile coupler lock compatible with most styles of trailer couplers. I've attached a video to assist and you can...
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    • What Size Hitch Balls Does Masterlock Coupler Lock part # ML389DAT Fit
    • The Masterlock Coupler Lock part # ML389DAT fits the three most common hitch ball sizes, 1-7/8 inch, 2 inch, and 2-5/16 inch. I attached a review video for this coupler lock for you to check out as well.
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    • Recommended Coupler Lock for 2004 Layton Lite 170LT Travel Trailer
    • If the coupler on your 2004 Layton Lite 170LT travel trailer is 4-1/8-inches wide you'll want a coupler lock like # DT25013KA that fits well on couplers up to 4-1/2-inches wide. A limited lifetime warranty protects this lock, which fits 1-7/8-, 2- and 2-5/16-inch couplers. 4 keys are included for the hard-to-pick tubular type lock.
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    • Does Master Lock Trailer Coupler Lock # ML389DAT Come with a Cover for the Key Hole
    • The Master Lock Trailer Coupler Lock # ML389DAT does not come with a cover for the key hole. The covers are a bit of a double edged sword though. On one hand they keep out dirt and debris, but on the other they trap moisture in the lock core which can cause corrosion to build.
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    Info for this part was:

    Expert Research:
    Michael L
    Edited by:
    Lindsey S
    Expert Research:
    Michael H
    Expert Research:
    Jameson C
    Video Edited:
    Jacob T
    Expert Research:
    Adam R
    Installed by:
    Cole B
    Photos by:
    Amber A
    Photos by:
    Zach O
    Updated by:
    Sarah W
    Written by:
    Alexander C

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