Coupler Locks & Trailer Locks

Master Locks 1-7/8"/2" UNIVERSAL COUPLER LOCKS MAS 377-DAT

The Master Lock No. 377DAT features a trailer coupler lock, designed to fit 1-7/8in (48mm), 2in (51mm) and most 2-5/16in (59mm) trailer 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.

Master Locks 2-5/16" UNIVERSAL COUPLER LOCKS MAS 378-DAT

Universal Trailer Coupler Lock. Universal coupler lock - fits 2-5/16 in. Hardened steel to provide maximum protection. Packaging explains application usage. K1 key blank. Retail packaging, master carton quantity 4.

Master Locks 3-1/2" LONG 1/4" DIA BARBELL LOCKS MAS 1471-DAT

Trailer Coupler Latch Lock. 3-1/2 in long shackle, 7 mm Dia shaft Barbell™ lock. Hardened steel to provide maximum protection. Fits UFP couplers and wider applications. Retail packaging, shelf pack quantity 4, master carton quantity 24.

REESE UNIVERSAL COUPLER LOCKS REE 72783

This REESE Towpower universal coupler lock prevents theft and keeps your trailer secure. The bright, yellow color is highly visible and deters thieves. It features a ratchet design with six locking positions for versatility, and is designed to fit 1-7/8 In., 2 In., and 2-5/16 In. couplers.
Patented design
Fits Most 1-7/8", 2" and 2-5/16" Trailer Couplers
Distance between lock shackle holes center to center is 4-1/2"
Includes two keys