Master Lock Universal Trailer Coupler Lock

Master Lock Locks - 379DAT

Guard against trailer towaway theft with this universal-fit coupler lock. Durable steel frame fits around 1-7/8", 2" and 2-5/16" ball couplers, providing both a visible and mechanical theft deterrent.

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
• Boasts integrated, weather-resistant cover that keeps dirt and moisture out of keyway
• Includes 2 keys
• Limited lifetime warranty

379DAT Master Lock Universal-Fit Trailer Coupler Lock

Video of Master Lock Universal Trailer Coupler Lock

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

Master Lock Universal Trailer Coupler Lock Review

Customers compare 379DAT to these similar products

Diversi-Tech Universal Trailer Coupler Lock for 1-7/8", 2" and 2-5/16" Couplers$40.85

Master Lock 1-7/8" and 2" Trailer Coupler Lock$34.95

Master Lock 2-5/16" Trailer Coupler Lock$44.95

Trailer Coupler Lock - Gorilla Guard For 2-5/16" Couplers$39.95

Master Lock Heavy-Duty Coupler and Latch Lock Combo for 1-7/8", 2", 2-5/16" Couplers$49.95

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Ask the Experts about this Master Lock Locks

• Trailer Coupler Lock to Fit a 2011 Rockwood Signature Travel Trailer
  
• I checked out the coupler on the 2011 Rockwood Signature Series Trailers online. The coupler is very different that other manufacturers, but I believe that we have an option that will work for you. The Maximum Security Universal Trailer Coupler Lock, item # DT25013, should work as long as the coupler width at the center of the ball is not greater than 4-1/2 inches. It looks to me like the sides of the Master Lock Universal Trailer Coupler Lock, item # 379DAT, would interfere with the construc
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• Will Master Lock Universal Trailer Coupler Lock Fit a RAM 2-5/16 Coupler
  
• I did a little research on RAM couplers. From what I saw, the Master Lock Universal Trailer Coupler Lock, # 379DAT, will fit the standard coupler type with a 2-5/16 inch ball size or the collar lock type that is more pointed at the end. If your coupler has a large lip around the outside where the lock would attach then it will not fit. If it does have a large lip but the width of the coupler from side to side is less than 4-1/2 inches, you could use # DT25013.
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• Coupler Lock for a Rockwood Signature Ultra Lite Travel Trailer 8312SS
  
• I did some research on the 2013 Rockwood Signature travel trailers and it looks like the coupler is similar to a Bulldog # BD4425000317 but it was hard to tell from the pictures available on the internet. The Maximum Security Universal Trailer Coupler Lock, # DT25013, should work as long as the outside coupler width at the center of the ball is no greater than 4-1/2 inches. The sides of the Master Lock Universal Trailer Coupler Lock, # 379DAT, could interfere with the construction of the c
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• Trailer Coupler Lock Recommendation for a Trailer with a Lunette Ring
  
• We do have a lock for a lunette ring, but lock # 379DAT will not work. You will want to use the Blaylock EZ Lock, # BLTL-60. The 2 cylinders fit inside the ring and then a pin is placed through them and padlocked on one side so no one can hitch up the trailer without first removing the lock. You can also use Master Lock, # 2989AT. This lock will fit around the ring and not allow anyone to hook up to the trailer. Take a look at the video I have linked.
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• 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 to
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• Recommendation of Trailer Coupler Lock to Fit a Titan 2-5/16 Inch Coupler
  
• The Master Lock Universal Trailer Coupler Lock, part # 379DAT, you have referenced will fit a 2-5/16 inch trailer coupler. I also have the Master Lock Universal Heavy-Duty Trailer Coupler and Latch Lock, part # 3784DAT, which is the similar surround lock that goes over the front of the coupler, but it will also include a latch lock that can be used to lock the latch on the coupler for twice the security. Another coupler lock that is one of our top sellers is the Diversi-Tech Universal Tra
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