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Master Lock

Master Lock 379ATPY Universal Trailer Hitch Lock , Black

  • Based on 5,113 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Oct 4
Order within 14 hours and 59 minutes
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Style: Trailer Hitch Lock


Features

  • Trailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers
  • Trailer lock is best used for vehicles, trailers, and RVs
  • Trailer coupler lock features advanced locking mechanism to resist picking and prying
  • Trailer hitch lock is constructed from zinc to resist rust and corrosion
  • Includes one trailer coupler lock, two keys

Description

The Master Lock 379ATPY features a universal trailer coupler lock, designed to fit 1-7/8 in. (48 mm), 2 in. (51 mm) and most 2-5/16 in. (59 mm) couplers. The advanced locking mechanism provides resistance to picking and prying. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.

Brand: Master Lock


Special Feature: Portable


Lock Type: Key Lock


Item dimensions L x W x H: 5.1 x 3.5 x 4.6 inches


Material: Zinc


Brand: ‎Master Lock


Special Feature: ‎Portable


Lock Type: ‎Key Lock


Item dimensions L x W x H: ‎5.1 x 3.5 x 4.6 inches


Material: ‎Zinc


Recommended Uses For Product: ‎vehicles, trailers, RVs


Style: ‎Trailer Hitch Lock


Color: ‎Black


Number of Pieces: ‎1


Finish Type: ‎Polished


Included Components: ‎Unit^Instruction Guide


Controller Type: ‎Hand Control


Shape: ‎Rectangular


Item Weight: ‎16 ounces


UPC: ‎071649229220


Model Name: ‎Universal Towing Coupler Lock, Steel


Global Trade Identification Number: ‎20


Manufacturer: ‎Master Lock


Part Number: ‎379ATPY


Item Weight: ‎1 pounds


Product Dimensions: ‎5.1 x 3.5 x 4.6 inches


Country of Origin: ‎China


Item model number: ‎379ATPY


Is Discontinued By Manufacturer: ‎No


Finish: ‎Polished


Item Package Quantity: ‎1


Special Features: ‎Portable


Batteries Included?: ‎No


Batteries Required?: ‎No


Warranty Description: ‎1 year manufacturer


Domestic Shipping: Item can be shipped within U.S.


Date First Available: June 11, 2007


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Secure and Reliable Lock
Style: Trailer Hitch Lock
The universal trailer hitch lock is solid and dependable. It fits perfectly, is easy to use, and provides excellent security for your trailer. Great value for peace of mind.
Reviewed in the United States on August 8, 2024 by JerryK
    • Great quality
Style: Trailer Hitch Lock
It’s easy to use, fits well, and offers solid security. The weather-resistant design is a bonus.
Reviewed in the United States on August 28, 2024 by oralia yarzabal
    • It fits and works just as it should
Style: Trailer Hitch Lock
It fit right on perfectly and is easy to put on and take off. It does the job and it seems pretty sturdy. Definitely worth the money.
Reviewed in the United States on June 9, 2024 by The Bugman
    • Reliable Trailer Hitch Lock
Style: Trailer Hitch Lock
The trailer hitch lock is sturdy and secure. It fits well, is easy to install, and provides peace of mind. Excellent quality and worth every penny. Highly recommended!
Reviewed in the United States on August 8, 2024 by HUONG TRAN
    • Master Lock Trailer Coupler Lock 379ATPY - Fits 1-7/8", 2", 2-5/16"
Style: Trailer Hitch Lock
I needed some locks for heavy-duty trailers that use 2-5/16" Bulldog couplers. I had previously had bad luck with Guardian locks, which were more expensive, not as well made, and not backed up by the manufacturer. These Master Lock coupler locks not only appear to be much better than the Guardian locks, they come with a limited lifetime warranty from Master. This lock fits the 2-5/16" Bulldog/Hammerblow couplers (in spite of the fact that this size is not listed) and is a very reasonable price. Fortunately, I cannot say how well they resist thieves' attempts to steal the trailer, but they will certainly provide a substantial deterrent. I bought mine in October 2008 and they have a chrome finish that appears to be excellent. Despite being in the weather all winter in Indiana, they still look and operate as if they were brand new. It looks like Master Lock has switched to the pictured painted or powdercoated finish instead of the chrome plating. I don't know how well the new finish will protect the mechanism compared to my chrome ones, but keep in mind that Master Lock offers a lifetime warranty, which covers operation but not finish. I have never had any trouble installing the lock to the coupler, but I agree that it can be a bit loose when locked. The lock attaches via a number of notches and it's unlikely that you'll find one that is exactly tight. There's no ratchet to help you with this, so you must squeeze the locking mechanism as you turn the key. It's more trouble to write about it than to do it. In spite of the slight looseness, I think someone would have a tough time getting it off the coupler. Regarding sticking tumblers or locking mechanism, I find that I must lubricate all my locks, including these, occasionally. Amazon also sells Master Lock model 379DAT, which has a rubberized coating. I bought one of those recently. It seems to be a bit looser on the coupler, I think because of the coating. Unless you are concerned about the possibility of the coupler's paint chipping from metal-to-metal contact, I would recommend the model 379ATPY over the 379DAT. See Painter Bill's review, dated July 11, 2011. Both of these locks are highly recommended, but especially the 379ATPY. ... show more
Reviewed in the United States on January 2, 2012 by Loren
    • Works Well
Style: Trailer Hitch Lock
Easy to use and would make it much more of a hassle for someone to steal trailer. Would recommend for the price
Reviewed in the United States on August 10, 2024 by Brad
    • Secure and Reliable Hitch Lock
Style: Trailer Hitch Lock
It’s sturdy, easy to install, and provides great security. Fits well on various hitches and offers peace of mind.
Reviewed in the United States on August 13, 2024 by kristin
    • Secure Trailer Hitch Lock
Style: Trailer Hitch Lock
This trailer hitch lock is excellent! It provides strong security, is easy to install, and ensures peace of mind while towing. Durable and reliable—perfect for keeping your trailer safe.
Reviewed in the United States on August 7, 2024 by candy reames

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