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Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches
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Master Lock

Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches

Part Number: 3794DAT
93 Reviews | 84 Questions
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$68.13
Retail:$72.79
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master lock trailer hitch standard pin fits 1-1/4 and 2 inch receiver coupler set - hitches
master lock trailer hitch fits 1-1/4 and 2 inch 3794dat
master lock trailer hitch 3794dat
master lock trailer hitch fits 1-1/4 and 2 inch 3794dat
master lock trailer hitch fits 1-1/4 and 2 inch
master lock trailer hitch standard pin
master lock trailer hitch standard pin
master lock trailer hitch standard pin receiver and coupler set - 1-1/4 inch 2 hitches

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Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches customer photo
Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches customer photo
Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches customer photo
Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches customer photo
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Kit includes a universal coupler lock to prevent towaway theft; an adjustable latch lock to ensure that your trailer won't be unhooked from the coupler; and a trailer hitch receiver lock that fits 1-1/4" and 2" hitches. Great Prices for the best trailer hitch lock from Master Lock. Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches part number 3794DAT can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Master Lock Trailer Hitch Lock - 3794DAT

  • Fits 1-1/4 and 2 Inch Hitch
  • Fits 1-1/4 Inch Hitch
  • Fits 2 Inch Hitch
  • Standard Pin Lock
  • Keyed Unique
  • 2 Inch Span
  • Master Lock
  • Bent Pin

Kit includes a universal coupler lock to prevent towaway theft; an adjustable latch lock to ensure that your trailer won't be unhooked from the coupler; and a trailer hitch receiver lock that fits 1-1/4" and 2" hitches.


Features:

  • Towing kit includes 3 locks for ultimate security
  • Universal-fit coupler lock deters trailer theft by fitting over the coupler, preventing hookup
    • Designed for use when trailer is not in tow
    • Constructed with a laminated, riveted steel frame for strength and durability
      • Center section that fits inside coupler is finned steel - will not warp or bend
  • Coupler latch lock keeps others from releasing your trailer once it is hooked up
    • Stainless steel construction is durable and rustproof
    • Adjustable lock with 6 locking positions fits:
      • 5/8" Latch width - most standard couplers
      • 1" Latch width - most 2-5/16" ball couplers
      • 2" Latch width - most wide-latch ball couplers
  • Trailer hitch receiver lock is used in place of standard pin and clip to prevent theft of ball mount or accessories such as cargo carriers and bike racks
    • Patented, stainless steel swivel head rotates 360 degrees for easy access
      • Brass keyway with aluminum casing conveniently faces toward you, not off to the side
    • Included pins will work with both 1-1/4" and 2" hitch receivers
    • Chrome-plated steel is durable and corrosion resistant
  • All locks have integrated keyhole covers to keep out dirt and moisture
  • 3 Keyed-alike keys and convenient storage bag included


Specs:

  • Coupler lock fits most 1-7/8", 2" and 2-5/16" ball couplers including:
    • Straight lip, rolled lip and surge brake/hydraulic couplers
    • Reese, Fulton, Valley, Atwood, Shelby, Putnam, Bulldog, Dutton-Lainson and UFP couplers
  • Pin diameter of coupler latch lock: 1/4"
  • Pin diameter of receiver lock: 1/2" and 5/8"
  • Inside pin length of receiver lock (span): 2-3/4"
  • Limited lifetime warranty


Replaces 3774DAT



3794DAT Master Lock Coupler Lock, Swivel Head Receiver Lock and Coupler Latch Lock

Installation Details 3794DAT Installation instructions





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Customer Satisfaction Score:

Ratings & Reviews

4.7

93 reviews
5 Stars
(76)
4 Stars
(11)
3 Stars
(2)
2 Stars
(1)
1 Star
(3)
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by:
It’s a set with everything I need to secure my trailer, whether connected or disconnected. The case is a bonus and overall an excellent value.
by:
The locks seem sturdy and work well with my trailer. I like that all the locks are keyed the same, so I only need one key to manage them all.
by:
Nice collection of locking stuff to secure your tow receiver, trailer, etc. Like the case to hold everything which I keep in the Jeep or the Trailer when not in use.
by:
Master locks are a name brand. It is so nice to have all locks keyed the same. This decreases the chance the camper will get stolen.
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Timmy B. profile picture

Timmy B.

4/16/2020

Very pleased. Glad to have one key for all locks.

by:
Excellent customer service and follow up, Thank You!
by:
Great product. All the locks work fine with my trailer and hitch. I feel more secure now leaving my boat park on the driveway. I was skeptical that it wouldn’t work with the square tongue but it fits really well and sturdy.
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by:
Very nice kit and handy case
by:
Ample room for the bits in the bag, which is nice. I used some of the shipping bubble wrap to pad it. Everything looks nice, works properly, and I've already installed the two trailer locks on my trailer. Decent theft deterrent, will at least slow 'em down or walk if they're lazy.
Toby profile picture

Toby

7/3/2014

Ive had this for a year now and its worked flawlessly. Granted, it is used on our trailer that is stored indoors. The locking mechanisms and key tumblers are still smooth. The bits have been exposed to rain and sun and still look

by:
This is my second purchase of this kit. I have used the products to secure a small cargo trailer I haul behind my motorcycle. The locks are easy to install and provide added security. I have never been disappointed with any prodducts purchased at etrailer.com. Customer service has been excelent. I would recommend this product to anyone.
James profile picture

James

1/24/2021

I am still happy with the performance of this item and recommend it to anyone.

by:
I've had this now for about a year, and it works very well. I like the fact that it all fits in the included case, and that all of the locking mechanisms are the same. I only have to carry one key for everything. I do think the lock for the coupler could be better, but overall I am very happy with these locks.
James profile picture

James

3/24/2019

I have been using this periodically since I purchased it, and it is still working great. I did lose one of the pins, so I might be purchasing a new one in the near future, but it isnt because the product isnt working as it is suppose to work, its because I cant find one of the pins.

by:
My wife and I bought a set for our utility trailer in 2018, and we were very pleased… We still use it. Last year, we bought the same set for our new boat trailer, and it works perfectly. I’d highly recommend this package.
by:
Nice to have a set of locking devices in one case all keyed the same.
HOWEVER, Not well designed & typical Chinese poor quality.
The coupling lock doesn't fit tight , its sloppy and loose. There is a short video of this same coupling lock being knocked off a trailer with one blow from a hammer.
The hitch shank pin has the locking cap perpendicular to the pin. With my tow vehicle I need to get on the ground to see and insert the key. Better to have the key hole in line with the pin and insert the key horizontal so the key hole slot is visible.
I wouldn't recommend this lock set.
by:
This seems to be exactly what they say. It works, I feel better knowing my trailer is not going to be taken easily !! A drop of oil in the key hole will help keep moisture out and the keys work better.
Jeff R. profile picture

Jeff R.

5/29/2014

Still happy with this product.

by:
Great product, the bag is not as cheap as you'd think. Hitch lock fits my camper hitch perfect. These are better than the Reese/Curt ones.
Christian K. profile picture

Christian K.

6/17/2018

After a year, bought a new trailer, same style hitch, but shaped different...doesn’t fit

Rachael H. profile picture
Etrailer Expert

Rachael H.

6/18/2018

This Master Lock trailer coupler does fit a wide variety of coupler sizes, profiles, and brands. I have included a link to our current offerings of trailer couplers if you would like to consider a different option.
by:
Just took on it's first camping trip and so far everything is great. Seems like sturdy construction and having 1 key for everything is AWESOME. Caps over lock are nice for keeping dirt and water out. One bonus is the hitch lock creates a sort of "shin protector" for that time in the dark when you walk into your hitch. Another buddy is ordering his set this week.
by:
Recently purchased a boat and need to park my boat on trailer at a storage lot due to HOA restrictions. The Master Lock set secures all components of the trailer and hitch lock. Operation is smooth and all locks protected from weather. Recommend.
by:
locks and because the website has so many to choose from, I called etrailer for advice. I explained that I wanted top quality locks to secure an Airstream and that nothing short of the sturdiest would do. I was pointed at this Master Lock set and told it was well-regarded by buyers. So I took it. When it arrived I could see straight away how flimsy most of it is. Only the receiver lock appears to be anywhere near robust.
I wouldn't buy this again - individual locks are a better way to go.
by:
This was a very easy installation. The custom fit design was exactly what I wanted. Wife and I installed it ourselves. Saved us hundreds of dollars and it looks professional. The video was very well done. Thanks etrailer for having these products available. We will definitely be using your services again!!!
by:
Probably not the best product available, but it provides a decent layer of protection for the money. I’m got it to make sure my utility trailer doesn’t walk away. My only complaint is that my trailer tongue was powder coated and the lock for when it isn’t connected to a tow vehicle scratched up the powder coating quite a bit.
by:
I just made a significant purchase from etrailer to fit out my SUV and a new trailer to haul my Teryx UTV. Because they specialize in "everything trailers", I found their selection of options to be one of the most extensive on line ...and the pricing is very competitive too. The only place I found a full set of trailer/hitch locks with common keying was on this site. The set looks well made as I'd expect from Master Lock.
Packaging was excellent , delivery was fast and I will order from them again. Not a giant web sales enterprise so very good customer service follow-up... and a phone number that a real person answers! Imagine that :)
by:
Amazing product and the highest quality on everything I ordered - Draw-Tite Hitch Receiver, Harness, and Lock and Coupler Set for my 2016 Chevy Traverse. The video online made it so easy to install. Also, the wire harness instructions on where to install fuses and replays was so easy! If I need any trailer needs in the future I’m definitely ordering only from etrailer. Thank you etrailer Team!!
by:
We feel like we've done everything we can to keep our trailer from being stolen. This lock set works great right out of the box (bag). Plus having the brand name of MasterLock gives us the added assurance that it will last more than one season. The directions were easy to understand and follow.
by:
All five products ordered are great! They are just what we where hoping for. The Aluminum Ball Mount you had to back order was worth the wait, and shipped to us as soon as you recieved it. You kept in contact with us and well informed us of what was going on with the order, thanks and we will probably use you again. We are on our way to pickup our new trailer now with all the equitment we just recieved from you for towing. Thanks Cindy
by:
Product works exactly as stated. Easy to use and higher quality than I expected. etrailer.com has been excellent through every step of the process instilling confidence in that if there was a problem I know they'd handle it. etrailer.com definitely deserves consideration when there's a choice between them and others. etrailer.com earns it!
by:
Items arrived quickly and as described. I feel very secure knowing that my trailer and hitch are safe from theives!
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See what our Experts say about this Master Lock Trailer Hitch Lock

Do you have a question about this Trailer Hitch Lock?
  • Compatibility of Keyed Alike Extended Length Locking Hitch Pin and Trailer Coupler Locks
    The Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches # 3794DAT are keyed alike, but adding the extended length locking pins will not allow the keyed alike to also include those pins. For the 3-5/8 inch usable length, I recommend the etrailer.com Trailer Hitch Receiver Lock - Extra Long # e98881 which can be keyed alike. For the coupler locks and the hitch pin length you are seeking, you will have two different keys because you have two different manufacturers...
    view full answer...
  • Trailer Hitch Receiver and 4-Way Wiring Harness For a 2018 Mini Cooper S John Cooper Works
    Yes, the EcoHitch Hidden Trailer Hitch Receiver # EH87FR will fit on your 2018 Mini Cooper S John Cooper Works 4-door hardtop. You can pair this with the Curt Towing Starter Kit # C45147 which has a 2" hitch ball with 3/4" rise. We do have the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set # 3794DAT which will allow you to secure the ball mount and trailer coupler to your Mini. It will also allow you to secure your trailer when it is in storage. You will need a Curt Powered...
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  • Recommended Keyed Alike Coupler and Hitch Lock
    Hey Heather, unfortunately the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set # 3794DAT is keyed unique so it's not available to be keyed alike. Instead, you'd have to use something like the Master Lock Set # ML44VR which come with all three locks keyed alike. This kit also works with 1-7/8", 2", and 2-5/16" ball couplers and 1 1/4" and 2" trailer hitches. If there is anything else I can do for you, please feel free to drop a comment and let me know!
    view full answer...
  • Can Trailer Coupler Lock Pins be Replaced?
    Hey William, thanks for reaching out! Usually there isn't a way to get just the replacement pin, but if you have a kit like the Master Lock # 3794DAT, we have some of it pieced out and you could get just the locking pins as part # 2866DAT or part # 2848DAT. This would come with an additional lock, but you would be able to simply swap it out to the one you currently have so everything is still keyed alike. If you let me know what specific lock kit you have, I'd be happy to see if we have...
    view full answer...
  • Recommended Coupler And Hitch Lock Combination Keyed Alike
    For your sleeve-lock coupler, I recommend the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches # 3794DAT. This will give you the hitch lock, the coupler ball lock and the pin lock. This kit is the best kit that has all three components keyed alike. If you want a better fit, you may need to move to a system with different keys. This Master Lock Set is very nice, but if you want the best coupler lock, I recommend you get something like the Blaylock...
    view full answer...
  • What is the Coupler Height of the Malone MicroSportXT Trailer # MPG460XT
    I spoke with my contact at Malone who said that the coupler height of the Malone MicroSportXT Trailer # MPG460XT is 15". When we installed the Draw-Tite Max-Frame Trailer Hitch Receiver # 76138 on a 2017 Mazda CX-5 the coupler height (from the ground to the top of the inside of the receiver) measured 13". If this is the case with your 2018 model then that means you will need a ball mount with a 2" rise. The Curt Fusion Ball Mount # C45155 is a great option as it has a 2-1/4" rise (the...
    view full answer...
  • Recommended Trailer Locks for Rented U-Haul Trailers to Secure When Connected and Disconnected
    Since you are looking to lock your trailer when connected as well as when disconnected, I recommend the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches # 3794DAT. This kit will give you a hitch pin lock for your ball mount, the trigger lock for the trailer when connected or disconnected from you vehicle, and the coupler lock to secure it when disconnected. These locks are all keyed alike for your convenience. I've attached a video to assist.
    view full answer...
  • Recommended Hitch/Coupler Lock Set For a 2022 Forest River Cherokee Alpha Wolf 33BH-L Travel Trailer
    I recommend the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set # 3794DAT for your 2022 Forest River Cherokee Alpha Wolf 33BH-L. This lock set includes a receiver hitch lock for 2" and 1-1/4" receiver, coupler latch lock and coupler storage lock. All locks are keyed alike to reduce the different keys you need to carry.
    view full answer...
  • How To Obtain Trailer Coupler and Hitch Pin Locks with Same Key
    If you're looking for a keyed alike surround coupler, coupler pin, and hitch pin lock we have a great option for you, the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set part # 3794DAT which comes keyed alike meaning the same key can be used for all included locks. It also comes with a handy storage bag for safe keeping while not in use. There's a total of four locks; one for the two for the coupler (one pin and one surround) and two for the hitch (1-1/4" and 2"). Unfortunately,...
    view full answer...
  • Locks For a Master Tow Car Dolly With 2" Ball Demco Coupler
    Based on information I could find on the Master Tow car dollies I see they use a 2" coupler like our # CT-5003-Z. For this I recommend getting the Master Lock Set # 3794DAT which will provide you with a coupler lock, storage lock and receiver lock all keyed alike. The InfiniteRule Lock # IR66FR you found is a great lock but is for their EZ Latch Coupler # 12564 if this is what you have.
    view full answer...
  • Can 2 Master Lock Trailer Hitch Lock Sets # 3794DAT be Keyed Alike to Each Other
    The Master Lock Trailer Hitch Receiver Lock and Coupler Set # 3794DAT referenced in your question cannot be keyed alike with another set but it will still be the best solution we have available for your two hitch receivers and couplers. This will allow you to use just a single key for each trailer lock setup. What I recommend doing is simply putting a small piece of tape on the lock and key and write an identifier on it (such as "1" and "2") so you can quickly remember which key is used...
    view full answer...
  • Trailer Hitch Receiver and 4-Way Wiring Harness For a 2014 Lexus GS 350 F Sport
    Yes, the Curt Trailer Hitch Receiver # C11366 is confirmed to fit your 2014 Lexus GS 350 F Sport rear wheel drive. If you will be using this receiver for trailer towing Curt recommends using the Ball Mount # C45521 with either a 1-7/8" # C40001 or 2" # C40018 hitch ball. You will need a Pin and Clip # F-4 to use the ball mount or if you wish to secure it with your trailer you will want to use the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set # 3794DAT. The T-One Vehicle...
    view full answer...
  • Trailer Hitch Receiver and Wiring Harness For a 2019 Infiniti Q50 Red Sport
    According to Draw-Tite their Sportframe Trailer Hitch Receiver # 24931 fits all models including the Red Sport trim on your 2019 Infiniti Q50. Draw-Tite recommends using the Ball Mount # 3592 with a 1-7/8" # 19257 or 2" # C40018 hitch ball. You will be able to hold the ball mount using a Pin and Clip # F-4 or you can secure it with the trailer using the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set # 3794DAT. The Curt T-Connector Vehicle Wiring Harness # C56248 will provide...
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  • Curt Trailer Hitch Receiver For a 2008 Toyota Prius For Towing and Carrying Yakima HoldUp Bike Rack
    When you install the Curt Trailer Hitch Receiver # C11468 on your 2008 Toyota Prius, you will need to use the Curt Cam Buckle Stabilizing Strap # 18050 with the Yakima HoldUp Bike Rack # Y02445. Curt recommends this to stabilize the bike rack. The Curt Class II Drawbar # C45521 is the current ball mount that is recommended by Curt for use with this receiver. Both the drawbars listed in the instructions were discontinued. You will need either a 1-7/8" Ball # C40001 or 2" Ball # C40018...
    view full answer...
  • Are There Keyed Alike Trailer Coupler Locking Pin Sets Available
    Hey Dave, We offer hitch pin and coupler latch pin kits with part # e99039 that you could have keyed alike but they don't come with the a lock for the coupler itself. We do offer the BOLT Locks brand which keys to your vehicle key so that you only have to carry one key. I would just need to know the year/make/model of your vehicle to determine which coupler lock # BL7032491, coupler latch lock # BL7025285, and hitch pin lock # BL7018447 you'll need.
    view full answer...
  • Ball Mount For Towing a 2,000LB Trailer With EcoHitch Receiver 306-X7221 Installed on a Nissan Leaf
    To determine the correct ball mount for the EcoHitch Hidden Trailer Hitch Receiver # 306-X7221 that fits the 2013 - 2021 Nissan Leaf you will need to know the height of your trailer coupler. This measurement needs to be taken with the trailer level to the bottom of the coupler. When we installed the EcoHitch Receiver on a 2020 Nissan Leaf we found the receiver height to be 12" to the inside top edge of the receiver tube. The hole for the hitch pin was 4" from the rear edge of the bumper....
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  • BOLT Trailer Coupler Lock Theft Deterrant
    The BOLT Trailer Coupler Lock # BL7032495 is theft deterrent. I can't say there are any lock systems out there that will 100% not come off. It really comes down to how good the thief is and how hard he is willing to work for it. The benefit to this system is it does fit a universal application for trailers and it will one time code to your specific Toyota Key. I recommend the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set # 3794DAT. It is a lock system that you can used when...
    view full answer...
  • Will The Curt Trailer Hitch Receiver C94UR(11612) Fit a 2023 Chevrolet Trailblazer RS?
    Yes, the Curt Trailer Hitch Receiver # C94UR is confirmed to fit your 2023 Chevrolet Trailblazer RS. If you will be using this for towing you will want to use the Curt Class I Drawbar # C45023 along with either a 1-7/8" # C40001 or 2" # C40018 hitch ball. The Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set # 3794DAT will allow you to secure the ball mount and trailer to your Trailblazer when towing. The T-One Vehicle Wiring Harness # TK26VR will give you a 4-way flat wiring...
    view full answer...
  • Class I VS II Trailer Hitch Receiver For a 2020 Toyota Camry For Towing A Trailer
    According to the owners manual for your 2020 Toyota Camry, "Toyota does not recommend towing a trailer with your vehicle. Toyota also does not recommend the installation of a tow hitch or the use of a tow hitch carrier for a wheelchair, scooter, bicycle, etc. Your vehicle is not designed for trailer towing or for the use of tow hitch mounted carriers." With that said if you decide to go ahead and tow a trailer the Curt Trailer Hitch Receiver # C11576 is a class I receiver which is rated...
    view full answer...
  • Mounting Dimensions For Curt Trailer Hitch Receiver # C12123
    The Curt Trailer Hitch Receiver # C12123 has mounting holes that are separated 38-1/2" from drivers to passenger side on center. The lower mounting hole sits 2-3/4" below the upper mounting hole and they are separated 7-3/4" on the same horizontal line. This receiver is custom fit for the 2014-2022(current model year) Ford Transit Connect. I have included a image below with the measurements as well. Curt does recommend using either the 1-7/8" # C45571 or 2" # C45572 Euro Drawbar with this...
    view full answer...
    Image 1 for
  • Receiver Height For 2009 Pontiac Vibe and Parts Needed For Trailer Towing
    With the Curt Trailer Hitch Receiver # C12228 installed on a Vibe similar to your 2009 Pontiac Vibe we noted the top of the hitch will sit at approximately 12". Please note that this can slightly due to different models offering different tire sizes and springs sagging due to age. The Curt Class II Drawbar # C45521 has a 2-5/8" rise that would put the ball mount at an approximate height of 14-5/8". A 2" Ball # A-82 or 1-7/8" Ball # A-80 will be needed depending on your trailer coupler....
    view full answer...
  • Parts Needed For Pulling a Trailer With a 2024 Kia K5
    First you will need the Curt Trailer Hitch Receiver # C58JR for your 2024 Kia K5. This will give you a class I receiver which will accept a Ball Mount # 3594 and either a 1-7/8" # 19256 or 2" # 19258 hitch ball to match your trailer coupler. Next you will need the Vehicle Wiring Harness # C95JR which will give you a 4-way flat connector. This is the most commonly found connector on most small trailer. I do recommend using the Master Lock Set # 3794DAT so you will be able to secure...
    view full answer...
  • Can Multiple Sets of Master Lock Trailer Hitch Lock Set be Keyed Alike
    There is not an option to get two sets of the Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set # 3794DAT all keyed alike but ordering two sets of these still gets you a total of six locks - two universal coupler locks, two trailer hitch receiver locks and two coupler latch locks - that can be unlocked with just two keys. So all you really need to do is put some masking tape on the locks and keys with an identifying mark (like putting "1" on a set of locks and keys and "2" on...
    view full answer...
  • Coupler Lock for Borrowed Trailer with Surge Brakes
    Due to the unique style of coupler that you send in a picture of the hitch lock that would work the best is the Fastway coupler lock part # FA86-0015-318 since this is a very universal style of lock that fits most couplers out there.
    view full answer...
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