An even heavier-duty trailer lock is Trimax's UMAX100 universal coupler lock. Like the UMAX50, the UMAX100 trailer hitch lock features a 9/16-inch shackle and offers 360 degrees of solid hardened ...

Retrue Universal Coupler Lock – $12.99. $12.99 at Amazon. This Retrue trailer coupler lock is one of the more affordable options for a trailer lock that is a fraction of the cost of its competitors.

CZC AUTO CZC AUTO Trailer Tongue Coupler Lock, Dia 1/4 Inch, 2-1/2 Inch Span Fits Latch-Type Coupler for Towing Boat Truck RV Car Trailer. $11 at Amazon.

Turnart Turnart Trailer Lock, Hitch Lock, Trailer Hitch Lock, Trailer Coupler Lock, Trailer Tongue Lock, Adjustable, Heavy-Duty Steel, Universal Size Fits 1-7/8. Now 17% Off. $29 $24 at Amazon.

Fifth wheel locks must be closed around the trailer kingpin with 1/4 inch (6.35 mm) or less gap visible between the lock jaws. 16. If you do not achieve a proper couple, repeat the coupling procedure.

Numerous coupler locks are sold, but we question their effectiveness for theft prevention. After all, a crook doesn’t really need the hitch. She can simply chain the trailer to her tow vehicle and ...

Explore the precision and expertise involved in repairing a fifth wheel Jost coupling assembly, along with fixing a broken trailer lock and pin using a lathe. Skilled workers bring their technical ...