Master Lock 377DAT Universal Trailer Coupler Lock, Chrome

Master Lock 377DAT Universal Trailer Coupler Lock, Chrome

5 Stars 5 out of 5   Review this Product


HNS Item Number: 377DAT
Brand: Master Lock
MFR #: 377DAT
UPC: 0071649047954

In Stock

Product Description

  • Guards Against Trailer Towaway Theft
  • Fits Most 1-7/8" and 2" Ball Diameters of the following Coupler Brands:
  • Reese, Fulton, Valley, Atwood, Putnam, Marvel, Ideal, Acme, Dutton-Lainson
  • Advanced Locking Mechanism Resists Picking and Prying
  • Easy to Install and Remove
  • Resists Rust and Corrosion
  • Lifetime Guarantee

5 Stars -- Colorado Springs, CO

Excellent lock [2/21/2020]

5 Stars -- Antlers

Shipping was outstanding [5/22/2019]

5 Stars -- Antlers

Great, Love this lock for my trailers [5/22/2019]

5 Stars -- Charleston, WV

Regarding the Master Lock Trailer coupler Lock 377DAT. I have a standard 2" ball and tongue on a Wells Cargo 5x10 trailer. The lock will not fit because the tongue has a flange around it to strengthen the tongue. On the lock - the distance from the locking pin to the ball on only about 1 1/4 inch. There is not enough space between the lock and the ball. After observing several other trailers, the flange surrounding the tongue would also prohibit the lock from fitting. I suspect other purchasers of this lock have found that it will not fit or work on their trailer. [9/12/2014]

Download Spec Sheet