Media Room /

Towing Security

  • Fits both Fixed and Adjustable style Gooseneck / Fifth Wheel, King Pin and Lunette Eye couplers
  • Laminated steel frame construction
  • Ultrasonic welded plastic housing
  • Keyway cover protects lock cylinder
Universal Trailer Coupler Lock
Retail Carded Product
Product Number Description List
Price
(each)*
Shelf
Pack
Quantity
Master
Carton
Quantity
2989AT Universal Heavy Duty Trailer Coupler Lock $123.47 n/a 2

  • Adjusts to fit many makes and models
  • Uses No. 1 key blank
Coupler Locks
Retail Carded Product
Product Number Description List
Price
(each)*
Shelf
Pack
Quantity
Master
Carton
Quantity
377DAT Universal Coupler Lock, Fits 1-7/8" & 2" Couplers; Keyed Different. $33.33 n/a 4
Commercial Boxed Product
Product Number Description List
Price
(each)*
Shelf
Pack
Quantity
Master
Carton
Quantity
377KA Universal Coupler Lock, Fits 1-7/8" & 2" Couplers; Keyed Alike $34.33 n/a 4

  • Adjusts to fit many makes and models
  • Uses No. 1 key blank
Coupler Locks
Retail Carded Product
Product Number Description List
Price
(each)*
Shelf
Pack
Quantity
Master
Carton
Quantity
378DAT Adjustable Coupler Lock, Fits 2-5/16" Couplers; Keyed Different. $44.52 n/a 4
378KADAT Adjustable Coupler Lock, Fits 2-5/16" Couplers; Keyed Alike. $46.30 n/a 4

  • Fits 1-7/8", 2", and 2-5/16" couplers manufactured by Reese®, Fulton, Valley, Atwood®, Shelby, Putnam, Hammerblow, Dutton Lainson, and UFP.
  • Advanced locking mechanism resists picking and prying.
  • Keyway cover protects lock from moisture and dirt
Universal Trailer Coupler Lock
Retail Carded Product
Product Number Description List
Price
(each)*
Shelf
Pack
Quantity
Master
Carton
Quantity
379DAT Universal Trailer Coupler Lock, Fits 1-7/8", 2" and 2-5/16" Couplers $27.78 n/a 2





*All Master Lock list prices are stated in US dollars. Our list prices do not necessarily represent retail selling prices at your local retailer or Master Lock distributor. Please contact them directly for specific product availability and pricing. Master Lock products are also available for purchase on-line through a number of retailers and distributors.

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