Compact stainless steel trailer coupler latch lock for compatible hook, thumb, trigger, and yoke-style trailer coupler latches, using a 1/4" pin with a 1-1/8" span.
The InfiniteRule 61106-S is a compact trailer coupler latch lock designed to help secure compatible trailer coupler latch mechanisms. It is intended for hook, thumb, trigger, and yoke-style trailer coupler latches where the latch width and lock depth match the lock’s dimensions.
This lock helps prevent the trailer coupler latch from being opened when secured, adding theft deterrence while the trailer is parked or stored. Its stainless steel construction, compact size, dust cover, and keyed locking design make it a useful security accessory for many RV, utility, cargo, boat, and equipment trailers with compatible latch geometry.
Helps prevent compatible trailer coupler latches from opening
Designed for latch applications requiring a 1-1/8" lock span
Compact pin size for compatible coupler latch lock points
Corrosion-resistant construction for trailer and outdoor exposure
InfiniteRule 61106-S is designed for compatible trailer coupler latches, including hook, thumb, trigger, and yoke-style latch designs. It is not a universal lock for all trailer doors, compartment doors, padlock hasps, receiver hitches, or every coupler latch style. Verify the coupler latch style, latch width, lock hole diameter, required span, latch depth, and clearance around the latch before ordering. InfiniteRule references this lock as a 1-1/8" trailer coupler latch lock; distributor listings commonly describe it as 1/4" diameter x 1-1/8" span x approximately 3/4" depth.
Before Starting: Confirm the trailer coupler latch is compatible with a 1/4" pin, 1-1/8" span, and the required latch depth. Inspect the coupler latch for damage, deformation, rust, or misalignment before installing the lock. Basic Use Steps: 1. Close the Coupler Latch: Make sure the trailer coupler latch is fully closed and seated according to the coupler manufacturer’s instructions. 2. Align Lock Point: Locate the latch hole or lock point where the trailer latch lock will pass through. 3. Insert Lock Pin: Slide the 1/4" lock pin through the compatible latch opening. 4. Attach Lock End: Install the locking end and secure it with the included key according to InfiniteRule instructions. 5. Check Fit: Gently pull on the latch and lock to confirm the latch cannot open and the lock is seated properly. 6. Install Dust Cover: Seat the dust cover to help protect the keyway from dirt, water, and grime. 7. Store Keys Safely: Keep spare keys in a safe location and record the key number if provided. 8. Inspect Regularly: Check the lock, latch, keyway, and coupler before travel or storage.
Package Contents: • 1 InfiniteRule 61106-S trailer coupler latch lock • 1/4" stainless steel lock pin with 1-1/8" span • Locking end / lock cylinder assembly • Dust cover • Keys as supplied by manufacturer or distributor packaging NOT Included — May Also Need: • Trailer coupler • Receiver hitch lock • Coupler surround lock • Trailer door or compartment lock • Padlock or hasp lock • Safety chains, towing hardware, or hitch components • Replacement coupler latch parts This listing is for the trailer coupler latch lock only unless otherwise stated. Confirm your latch style, pin hole size, span, depth, and clearance before ordering.
To confirm compatibility before ordering, have the following ready: • Trailer coupler brand and model, if available • Latch style: hook, thumb, trigger, yoke, or another design • Latch lock hole diameter • Required usable span across the latch • Required latch depth / clearance behind the latch • Photos of the coupler latch in the open and closed positions • Whether you need a latch lock, coupler surround lock, receiver lock, or trailer door lock Why this matters: Trailer latch locks are application-specific. Similar-looking coupler latches can require different pin diameters, spans, depths, and lock styles.
Match this lock by coupler latch style, pin diameter, usable span, latch depth, and lock-body clearance. Do not select it as a general trailer door or compartment lock.
If fitment or locking issues continue, check coupler latch style, pin hole size, usable span, latch depth, lock-body clearance, key operation, and whether a different InfiniteRule latch lock model is required.
This latch lock is a theft-deterrent accessory and does not replace proper trailer coupling procedures. Always confirm the coupler is correctly latched to the hitch ball, safety chains are attached, breakaway system is connected if equipped, and all towing components are properly rated before travel. Do not tow with a damaged, mis-sized, loose, or improperly installed latch lock or coupler assembly.