bing tracking image
  1. Trailer Coupler Locks
  2. Master Lock
  3. Stainless Steel
  4. Latch Lock
  5. Keyed Unique
  6. Universal Application Lock
Master Lock Adjustable Trailer Coupler Lock - Stainless Steel

Master Lock Adjustable Trailer Coupler Lock - Stainless Steel

Item # 2847DAT
Retail:$16.77
Our Price: $12.23
You Save: 27%
Trailer Coupler Locks
Orders above $50 qualify for Free Shipping
Shipping Weight: 0.3 lbs
Quantity: 
In Stock
Master Lock 5/8 Inch Span,1 Inch Span,2 Inch Span Trailer Coupler Locks - 2847DAT
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Lock secures most latch-style trailer couplers. Rubber-encased pin tumbler cylinder adjusts incrementally - from 9/16" to 2-3/4" - along notched, 1/4" diameter stainless steel shank. Great Prices for the best trailer coupler locks from Master Lock. Master Lock Adjustable Trailer Coupler Lock - Stainless Steel part number 2847DAT can be ordered online at etrailer.com or call 1-800-496-5010 for expert service.
  • All Info
  • Reviews (71)
  • Q & A (0)
  • Videos (2)
  • Photos
  • Used (1)
  • Why etrailer?

Master Lock Trailer Coupler Locks - 2847DAT

  • Stainless Steel
  • Latch Lock
  • Keyed Unique
  • Master Lock
  • Universal Application Lock
  • 5/8 Inch Span
  • 1 Inch Span
  • 2 Inch Span

Lock secures most latch-style trailer couplers. Rubber-encased pin tumbler cylinder adjusts incrementally - from 9/16" to 2-3/4" - along notched, 1/4" diameter stainless steel shank.


Features:

  • Stainless steel prevents rust and corrosion
  • 4-Pin tumbler lock resists picking
  • Usable length: 3-3/16"
  • 1/4" Diameter pin fits coupler latches with the following widths:
    • 5/8" - Most standard couplers
    • 1" - Most 2-5/16" ball couplers
    • 2" - Most wide latch couplers such as Atwood, Titan, and more
  • Limited lifetime warranty


2847DAT Master Lock Adjustable Trailer Coupler Lock - Stainless Steel





Video of Master Lock Adjustable Trailer Coupler Lock - Stainless Steel

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




Video Transcript for Master Lock Adjustable Trailer Coupler Lock Review

Today on our trailers, we're going to take a look at the Master Lock adjustable trailer coupler lock, part number 2847DAT. Let's go ahead and see what it looks like on our trailer. Here we have our stainless steel lock rod and tumbler. As you can see, the tumbler is in a nice rubber-coated housing. We open the cap on it and we can open up the key and tumbler inside. What's really nice about it having a cap is it's going to help keep out that dirt, dust, debris, and especially moisture and will prevent corrosion over time. Provided with the lock is also two keys. We can take the key, rotate the tumbler, and remove the lock rod.

As you can see, the lock rod has multiple locking points for different sizes and styles of trailer coupler latches. For this one, we can go ahead and take the lock rod, feed it through the latch, pushing it up tight against the latch, and then take the key and tumbler, slide it on, rotate it, remove the key, put our cap back on. Now our tumbler is locked to the rod, and the latch on our coupler is locked. If it was already on our vehicle and locked to the trailer ball, it couldn't be removed, adding security to our trailer from theft. Now, to remove our lock, we simply take our key into the tumbler, rotating it so we can slide the lock rod out, and we're ready to unlock our trailer and load it up on our vehicle. There you have it for the install, operation, and review of the Master Lock adjustable trailer coupler lock, part number 2847DAT. .

Customer Satisfaction Score:


Customer Reviews

Master Lock Adjustable Trailer Coupler Lock - Stainless Steel - 2847DAT

Average Customer Rating:  4.7 out of 5 stars   (71 Customer Reviews)

Lock secures most latch-style trailer couplers. Rubber-encased pin tumbler cylinder adjusts incrementally - from 9/16" to 2-3/4" - along notched, 1/4" diameter stainless steel shank.

by:

I usually store my Anderson hitch drawbar in the coupler. I had a Bulldog installed on my Airstream (well worth the $500 it cost). I use this lock when among friends to prevent them from dropping the Anderson on a foot if they are curious about the Bulldog. This lock would not deter a thief.




by:

Only fair at best very cheesy lock




by:

Good quality




by:

i worked good with my trailer and it fits perfect




by:

The stainless steel feature is nice




by:

works good good price




by:

The lock worked very well. It fit perfectly into the existing hitch pin hole. The variable length on the lock shaft allowed me to snug up the lock to the hitch mechanism which I think will make it more difficult for any thief to cut or remove the lock. The key operation was simple and easy. I use the lock pin when my trailer is attached to my vehicle and also when it is not attached so as to serve as a secondary trailer coupler lock and not allow the coupler to be opened for thieves to insert their ball hitch and steal the trailer and boat. Great product.




by:

It bends because its thin at each locking point


Comments
I went out to the warehouse to test a few of these and they seem sturdy and would not bend with bare hands, however, if you do see bending in the lock, perhaps a beefier surround lock will be better for you. Something like item # DT25013KA
Fastway Universal Trailer Coupler Lock for 1-7/8", 2" and 2-5/16" Couplers
$56.08
will work if your coupler width is smaller than 4.5 inches.
-- Etrailer Expert Sierra K - 12/16/2021


by:

Love this product. The stainless steel is a key feature (no pun intended)


Comments
Still kicking
Jimmy W - 06/17/2021


by:

Easy ordering process!
Fast shipping!
Product
as described.
Installed easily and seems to be a quality product .
Feels very solid.
Installed on my gearspace 34 cargo carrier.
Great price!




by:

Worked as advertised.




by:

Johnathon was my sales rep that I dealt with when I had questions. He was great and he kept track of my order and when the trailer hitch was not available from the manufacturer until late March, he helped me choose another one and sent it to me with the freight free of charge. It took only two days to arrive and I am very happy with the hitch and wiring harness. Highly recommend.




by:

Ordered product for my Tab Travel Trailer and it turned out I ordered the wrong item They gladly refunded the mistake and sent my the right one. I had called and they guided me to the correct product. Very happy...vann


Comments
I’m a happy customer….Thank you
vann a - 03/16/2018


by:

I purchased a pin type trailer coupler lock and a ball type coupler lock. Both work well and were easy to install. Of the many products available from etrailer, it was easy to find what I needed. It was shipped the same day as ordered and arrived quickly. As a first time customer, I am very pleased with the results. I will shop at etrailer.com for future needs and wants. As a matter of fact, I had a product question quickly answered by etrailer experts and ordered the suggested item today. I give etrailer 5 1/2 stars!




by:

I don't rate this product very high since the Master Lock assembly is poorly built. I believe it would not take a thief long to break the lock and just pull the pin out. The lock is even hard to operate with the key. Not recommended
I am using this product with the coupler lock I purchased. I am thinking if its worth the hassle to send it back.




by:

I believe it will be functional as it is advertised, but I does not appear to be as well build as most Master Lock products have purchase before. I does fit my trailer hitch that is was ordered for.




by:

Third timers the charm.




by:

I placed the order on a Saturday and it was filled on Sunday, the next day!! I received the order today - Wednesday via UPS. I wish everyone took the same responsibility to provide the utmost in customer service as E-trailer has. When I need any further trailer parts they will be my first and only location I will order from!!

Ron




by:

Had to drill out the whole in the trailer latch to make this product fit
It is exactly what I wanted. Now my trailer is safe from theft and uncoupling.




by:

Great product. Fits my 2010 Wrangler perfectly. etrailer was the best to deal with. Very personable and quick shipping. Great company.




by:

Does exactly what I bought it for. The pin is long enough to go through the hitch and ensures that it doesn't wiggle loose.
This gives me peace of mind, and is more secure than a bolt with a nut on it.




by:

Perfect to replace a lock on Let's Go Aero Gearwagon




by:

Lost the lock portion of the one I had before. Always go straight to trailer.com for anything I need! Great service, got the item in a week.




by:

Although it will only keep the honest folks honest, it gives me a little more piece of mind having this securing the tongue latch on my trailer.




by:

Hitch lock works great. I wish it could have been keyed the same as my receiver lock pin...but that wasn't an option.



25
71
Show More Reviews

See what our Experts say about this Master Lock Trailer Coupler Locks

  • Pin Lock for Yoke Style Trailer Coupler
    The Master Lock Adjustable Trailer Coupler Lock # 2847DAT is a great lock to use to lock the yoke style coupler you sent in a picture of. I attached a picture of it used to lock a coupler just like yours for you to check out as well.
    view full answer...
    Image 1 for
  • What Are the Dimensions of the Master Lock Coupler Lock, Part # 2847DAT
    The pin of the Master Lock Coupler Lock, part # 2847DAT is 4 inches long. The pin has detents that allow it to fit latches up to 2 inches wide. The end cap is constructed of high impact plastic, and there is a metal button underneath that will prevent the pin from passing through the coupler latch if the plastic cap is removed.
    view full answer...
  • 5/8 inch Diameter Coupler Lock Recommendation
    Nearly everyone of our coupler locks have a pin diameter of 1/4 inch. The Masterlock Lock part # 2847DAT happens to be 5/8 of an inch in diameter.
    view full answer...
  • Pin Style Coupler Lock Recommendation that Requires at 9/16 inch Span
    A snug fit is preferred when picking out a pin style coupler lock for a trailer coupler. If you have 9/16 of an inch from the outer edges of the latch on your coupler I wouldn't recommend going with a 1/2 inch span lock as it would be too short and wouldn't latch. Instead I would go with the Master Lock Coupler Lock part # 2847DAT as it can be adjusted down to a 5/8 inch span and would work well for you. I attached an install video for this lock for you to check out as well.
    view full answer...
  • Coupler Lock for 2016 Airstream International
    I reviewed the specs for the Airstream International travel trailers and while they appear to have a standard latch coupler, the one I saw in photos does appear to have a curved lip which could potentially interfere with some coupler locks. No coupler dimensions are provided on the Airstream site. The lock you referenced, Atwood AMPlock Underslung Coupler Lock AT89006, will fit couplers up to 4-5/8-inches wide including the lip. Since you cannot measure your coupler you may prefer using...
    view full answer...
  • What Size Coupler Latches are Compatible with the Master Lock Adjustable Trailer Coupler Lock
    The Master Lock Adjustable Trailer Coupler Lock, # 2847DAT, is designed to fit coupler latch widths from 5/8 inches up to 2 inches wide. In all likelihood, it will fit your coupler. I recommend measuring to make sure. If you get a width that is less than 2 inches and has a hole for a lock that is 1/4 inches or less in diameter, this lock will fit. I have included a link to a video review of this lock for you. I have also included a link to all of the coupler locks we carry.
    view full answer...
  • Pin or Lock Recommendation for a Yoke Latch Coupler
    It sounds like you are talking about a latch pin which would go through the latch and prevent it from opening. It isn't a necessary part but usually what people do with the latch holes is use a latch lock. I recommend Master Lock Adjustable Trailer Coupler Lock - Stainless Steel Item # 2847DAT because it is adjustable to fit latches with different widths from 5/8 inch wide to 2 inch wide. The pin has a 1/4 inch diameter which is the most common latch hole size. I have linked a video review...
    view full answer...
  • Replacement Coupler Trigger Latch for 5/16" Diameter Latch Hole
    If you've got a 5/16" diameter hole, those are usually on coupler latches, so it sounds like the Master Lock Adjustable Trailer Coupler Lock - Stainless Steel # 2847DAT is what you're looking for. This lock has a 1/4" pin and is designed for 5/16" latch holes, so it will fit your application. This lock is made from stainless steel so it's not going to rust when exposed to the elements, and the dust cap will keep moisture out of the locking mechanism. I've linked a short video review of...
    view full answer...
  • Trailer Coupler Lock Solution for Coupler that is 4-5/8 inches Wide
    It looks like would need to get a latch coupler lock like a Master Lock Adjustable Trailer Coupler Lock - Stainless Steel, part # 2847DAT, for your trailer that has a flange width of 4-5/8 inches. I attached a link to a review video of this coupler lock for you to check out. We do not have a surround coupler lock that will be wide enough to fit on a coupler that has a distance of your trailer.
    view full answer...
  • How Tight Will Master Lock Universal Trailer Coupler Lock # 379DAT Fit on 2-5/16 Inch Demco Coupler
    The Master Lock Universal Trailer Coupler Lock, part # 379DAT, is designed to work on all three hitch ball sizes, 1-7/8 inch, 2-inch, and 2-5/16 inches. Since it fits all three sizes it will not be able to be very tight, but you will want to make sure to slide the body of the lock up against the coupler as far as possible when attaching the lock to the coupler. As long as the lock cannot be removed after you lock it to the coupler it will work just fine in keeping somebody from connecting...
    view full answer...
  • Can an Additional Latch Lock Keyed to Match Lock Set 3784DAT be Ordered
    We may be able to accommodate you. You would need lock # 2847DAT. To get it keyed the same as lock set # 3784DAT we would physically have to pull the matching one from inventory. There is no guarantee that we will have that number in stock. But in order to start the ball rolling you will need to call customer service at 800-298-8924 and explain that you need # 2847DAT keyed to match the # 3784DAT lock set you already have.
    view full answer...
  • Stainless Steel Trailer Coupler Pin with 1/4 Inch Diameter
    The 1/4 inch diameter snapper pins we have are all regular steel. For a stainless steel 1/4 inch diameter pin take a look at the locking pin # 2847DAT. I have included a link to a video review for you. You will get the stainless steel construction you are after plus the added security of a lock.
    view full answer...
  • Coupler Lock Recommendation for use on a Coupler that has a 5 inch Wide Flange
    It looks like would need to get a latch coupler lock like a Master Lock Adjustable Trailer Coupler Lock - Stainless Steel, part # 2847DAT, for your Four Winns trailer that has a 5 inch wide flange. I attached a link to a review video of this coupler lock for you to check out. We do not have a surround coupler lock that will be wide enough to fit on a coupler that has a distance of 5 inches across.
    view full answer...
  • Coupler Lock With 1/4 Inch Diameter Pin Recommendation
    For our hitch receivers, we offer hitch receiver locks that have either 1/2 inch or 5/8 inch diameter pins. Depending on what you intend to use the locking pin for we do have other options available. We carry locking coupler pins that may work for you. The first lock I recommend is the Master Lock Adjustable Trailer Coupler Lock, part # 2847DAT. This is a 1/4 inch diameter pin that has a keyed lock and is adjustable to fit lengths of 5/8 inch, 1 inch, and 2 inch. Another coupler lock...
    view full answer...
  • Does 1/4 Inch Diameter Snapper Pin Come in Stainless Steel
    The 1/4 inch diameter snapper pins we carry are all regular steel. For a stainless steel 1/4 inch diameter pin I recommend locking pin # 2847DAT. I have included a link to a video review for you. You will get the stainless steel construction you are after plus the added security of a lock.
    view full answer...
  • Comparison of the Deadbolt Coupler Lock and Master Lock Adjustable Coupler Lock
    The main difference between our etrailer.com Coupler Lock, item # e98890, and the Master Lock Adjustable Trailer Coupler Lock - Stainless Steel, item # 2847DAT, is the style of the locks. The Masterlock has the advantage of being able to be used on many different styles of coupler and has a normal style key that can be duplicated at a local hardware store. The Deadbolt has a short span, 7/8 inches, so it can be flush to prevent removal. This style is more compact than the stick and block...
    view full answer...
  • Stainless Steel Trailer Coupler Lock for a Trailer Buddy XR-84 Surge Brake Actuator
    The Master Lock adjustable trailer coupler lock # 2847DAT will work with your Trailer Buddy XR-84 surge brake actuator because it has a 1/4 inch diameter pin. The Trailer Buddy can accommodate coupler locks with diameters of 1/4 and 5/16 inches. It can adjust to accommodate widths of 5/8, 1 or 2 inch couplers. It is also stainless steel per your request. Another style to consider is the trailer coupler lock that codes to early model GM keys. For example, the Bolt coupler lock # BL7025283...
    view full answer...
  • Recommended 3 Inch Locking Hitch Pin For Boatmate Tandem Trailer
    We do have a locking hitch pin that may work very well for you. I recommend the Trailer Coupler Lock, part # e98888. This is a 1/4 inch diameter pin that has a 3-3/8 inch span. This lock has a covered key slot that will help prevent corrosion. I have attached a product review video you can check out. The pin on the Master Lock Coupler Lock, part # 2847DAT you referenced is 4 inches long but is designed to fit latches up to 2 inches wide. It would not work in the 3 inch span you said you need.
    view full answer...
  • Coupler Lock Recommendation for a Bulldog Cast Coupler # BD4425000317
    I went out to the warehouse and pulled a Bulldog trailer coupler, # BD4425000317, to determine what the best lock for it would be. The best option would be a simple latch lock like # 2847DAT. This will prevent the latch from opening. I have included a link to a video review of the lock for you.
    view full answer...
  • Can Master Lock Trailer Coupler Locks be Keyed Alike?
    The Master Lock Adjustable Trailer Coupler Lock - Stainless Steel # 2847DAT is not offered in a keyed alike option, so if you order 3 you will have 3 separate keys. If you want locks that are keyed alike, I recommend the etrailer.com Stainless Steel Trailer Coupler Lock - 7/8" Span # e98890 which you can select keyed alike from the drop down box after selecting your quantity desired. I've attached the link to all your keyed alike options.
    view full answer...
  • Will Masterlock Coupler Lock Fit Demco EZ Latch Surge Actuator
    Yes, since the Masterlock coupler latch lock part # 2847DAT has a 1/4 inch diameter and has a usable span of up to 2-3/4 inches it would fit and work well on the Demco EZ latch style of surge actuator # DM8164311. I attached a review video for this lock for you to check out as well.
    view full answer...
  • Can Master Lock Adjustable Trailer Coupler Locks be Keyed Alike?
    Though we do have many coupler locks which can be keyed alike, unfortunately the Master Lock Adjustable Trailer Coupler Lock, # 2847DAT, is not one of them. There is an adjustable coupler lock which offers plenty of convenience in the BOLT Trailer Coupler Lock, # BL7025289. This lock can be coded to the ignition key of your 2004 Toyota Tundra so you do not have to carry any extra keys. I have added a link to a review of this lock, as well as the link to our page displaying each of our...
    view full answer...
  • Are Bolts Necessary to Mount Adjustable Channel Trailer Coupler
    While I completely understand it can be a bit of a pain and more time-consuming than you'd like, I have to recommend you only use the included bolts that come with an adjustable channel trailer coupler such as # CTA-400. Using these bolts (which are grade 8 bolts) ensure the coupler maintains its capacity and stability for the safest towing set up. I know it's not the answer you were looking for but the only option to help prevent theft is to add a lock to the latch, the Master Lock Adjustable...
    view full answer...
  • Locking Titan Zinc-Plated Straight Tongue Coupler T4853100 to Hitch Ball
    Yes, to secure/lock the Titan Zinc-Plated Straight-Tongue Coupler # T4853100 to the hitch ball you can use a latch lock like the excellent Master Lock # 2847DAT. This will insert through the existing holes on the latch to prevent it from pulling up and unlocking from the ball. It features a 4-Pin tumbler lock that discourages picking and the stainless steel shank will resist any rust or corrosion. I have attached a short video demonstration that you can check out as well.
    view full answer...


< Previous



Do you have a question about this Trailer Coupler Lock?


Used Items Available
Used Picture for Master Lock Adjustable Trailer Coupler Lock - Stainless Steel

Condition: Like New

Notes: May have damaged packaging or minor cosmetic blemishes.

Our Price: $11.95
Secure Checkout


  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer coupler lock information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Robert G
Expert Research:
Robert G
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Brian B
Updated by:
Brian B
Employee Wilson B
Updated by:
Wilson B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.