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  1. Trailer Tongue Lock
  2. Master Lock
  3. Fits 1-7/8 Inch Ball
  4. Fits 2 Inch Ball
  5. Fits 2-5/16 Inch Ball
  6. Keyed Unique
Master Lock Universal Trailer Coupler Lock
Master Lock

Master Lock Universal Trailer Coupler Lock

Part Number: 379KAATPY
In Stock
$40.21
Retail:$55.49
You Save: 28%
Trailer Tongue Lock
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Great Prices for the best trailer tongue lock from Master Lock. Master Lock Universal Trailer Coupler Lock part number 379KAATPY can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (48)
  • Q & A (0)
  • Photos

Master Lock Trailer Tongue Lock - 379KAATPY

  • Fits 1-7/8 Inch Ball
  • Fits 2 Inch Ball
  • Fits 2-5/16 Inch Ball
  • Keyed Unique
  • Master Lock
  • Steel


Features:

  • 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
  • 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
  • Includes 2 keys per lock
  • Limited lifetime warranty


379ATPY Master Lock Universal-Fit Trailer Coupler Lock





Ratings & Reviews

4.4

48 reviews
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by:

Works fine.



by:

Great product!



by:

Easy, secure, worth it every dollar.



by:

I do not own this lock. Did not order



by:

The ease of ordering was great and the product arrived as promised. The product itself was less than expected. It is made of plastic and I'm not sure it was the right choice. I will not return the product, but will look for something else that I feel is more substantial.



by:

Adequate. Doesn’t fit particularly well, but would work to slow down a thief. I suspect a strong blow with a hammer would take it off.



by:



by:

Fast shipping, thank you



by:

As expected, and fast shipping



by:

So far been great ,2 years andno problems easy to install and take off , gives some security for the trailer left in a parking lot over night. Worth the money



by:

Lock feels a bit cheap. Steel feels like Pot Metal. I dont think it would take too much effort for a theif to remove this. Fits on trailer pretty loose, moves around quite a bit.



by:

Product workeda expected. Very simple to use. Looks pretty sturdy and should last forever.



by:

The lock was just as described. The price was very fair and it was delivered one day sooner than estimated.



by:

This is the first of three trailer locks I've purchased that actually WORK for my trailer. Although I would prefer a heavier material for it to be made of, it works wonderfully.



by:

Arrived on time as promised. Decent product. Quite loose in the fit more so than in the videos or so it seems. Still, it does block access to the hitch. Time will tell if it works to keep the scumbags from stealing my trailer.



by:

It gets the job done! I have a 14' flat trailer I like to keep in my driveway, this is the perfect fit for the job. I have large trailers and use the same type lock on those too.



by:

doesn,t fit trailer tongue too tightly.still a deterant.but could easily be broken



by:

Product is ok. But if hit with a hammer could be broken off. Use is for trailer theft
etrailer, is a great supplier quick delivery great description



by:

Great product that is easy to install on the trailer hitch making it very secure.



by:

I bought two of these to put on my pontoon boat and an enclosed trailer that will be stored on another property. I really like the design and after getting it out of the packaging it works great. I put it on my enclosed trailer and will also use the other one on my boat. The entire process worked well with the only glitch was the computer didn’t recognize shipping it to a different address. Jenny was great and was able to walk me through the process completely. I only wished I would have asked to have both locks keyed the same. Would have eliminated an additional set of keys. Still very pleased with the product.



by:

Great product. I bought originally for my travel trailer but ended up using it on my enclosed cargo trailer that lives outdoors all year. So far no issue with the lock seizing up from moisture or rust.



by:

The lock fit well no play in it.



by:

I bought this lock after my trailer was stolen due to a very cheap lock I had on it. This lock is easy to use and is solid. I purchased this over a year ago and have had no issues with thievery since.



by:

Product is as dedscribed and works well. Shipped ASAP



by:

Master lock coupler lock is so easy to use and give you piece of mind that your trailer is safe. This is my second one and I love it. Etrailer shipped it so fast I will be ordering from them again.


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