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 ...

The Altor ICON Trailer Lock has been on the market for awhile now, but nonetheless, the company has some exciting news to share: the ICON coupler lock has now been fitted to over 95% of the ...

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.

Puny Locks. I needed a trailer lock. I was headed off on a camping and fishing trip and needed a way to secure the boat and trailer when I wasn't around.

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.

Lock the coupler to the tow vehicle. As previously mentioned, a thief might chain an unhitched trailer to his truck and tow it away even if a lock is fitted to the coupler. But if the trailer is ...

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.

If flatness exceeds the specifications as shown in Figure 2, replace the trailer upper coupler plate. Figure 1. ... A long kingpin will result in excessive wear in the locks and coupling difficulty.

Here’s how to get the job done, using a Tie Down Engineering trailer-disc-brake model 750E (for a 2-inch tow ball) designed to fit a 3-inch-wide trailer tongue. The zinc-plated assembly features a ...