Four-pack keyed-alike stainless steel lock set for compatible B&W 3" Tow & Stow 21K adjustable ball mounts, including three hitch locks and one receiver lock.
The InfiniteRule 61781-S is a four-piece keyed-alike lock set designed for compatible B&W 3" Tow & Stow 21K adjustable ball mounts. It includes three hitch locks for the adjustable ball mount section and one receiver lock for securing the hitch shank in a compatible 3" receiver application.
This set is intended to secure both the adjustable Tow & Stow hitch section and the receiver connection with one matched keyed-alike package. It should not be treated as a generic RV hitch lock kit, universal receiver lock set, or trailer coupler lock kit.
Includes three hitch locks and one receiver lock for matching B&W Tow & Stow applications
Designed for compatible B&W 3" Tow & Stow 21K adjustable ball mounts
All included locks are supplied as a matched keyed-alike set
InfiniteRule locks are manufactured in the United States
InfiniteRule 61781-S is for compatible B&W 3" Tow & Stow 21K adjustable ball mounts. It includes three hitch locks for the adjustable ball mount portion plus one receiver lock for the compatible 3" receiver connection. Verify the exact B&W Tow & Stow model, hitch rating, receiver size, pin diameter, required span at each lock point, and lock-head clearance before ordering. Do not assume fitment on other B&W Tow & Stow models, Gen-Y hitches, CURT hitches, standard ball mounts, pintle hooks, couplers, or unrelated towing accessories.
Before Starting: Confirm the hitch is a compatible B&W 3" Tow & Stow 21K adjustable ball mount and that the receiver lock span matches the vehicle receiver setup. Check all lock points before inserting the locks. Basic Use Steps: 1. Confirm Hitch Model: Verify the Tow & Stow model, rating, receiver size, and lock point dimensions. 2. Check Pin Diameter and Span: Compare each required lock location to the included lock diameters and spans. 3. Separate Lock Head: Use the key to separate the lock head from the pin according to InfiniteRule instructions. 4. Install Hitch Locks: Insert the three 45/64" hitch locks through the matching adjustable ball mount lock points. 5. Install Receiver Lock: Insert the 5/8" receiver lock through the compatible receiver and hitch shank lock point. 6. Lock Each Pin: Reinstall the lock head and rotate the key until the lock is fully secured. 7. Check Engagement: Tug on each lock to confirm it is fully seated and cannot slide out. 8. Close Dust Covers: Press the weather-resistant dust covers into place to help protect the keyways from road grime and moisture. 9. Recheck Before Towing: Confirm the hitch, ball platform, receiver connection, and all pins are properly installed before towing.
Package Contents: • 3 keyed-alike hitch locks — 45/64" diameter x 4-5/8" span • 1 keyed-alike receiver lock — 5/8" diameter x 3-5/8" span • Keys as supplied by InfiniteRule packaging • Weather-resistant dust covers as supplied with the locks NOT Included — May Also Need: • B&W Tow & Stow adjustable ball mount • Receiver hitch • Trailer coupler lock • Safety chains, hitch ball, ball platform, or drawbar components • Replacement keys unless supplied by current packaging • Locks for other receiver sizes or non-matching hitch models This listing is for the keyed-alike lock set only unless otherwise stated. Confirm the hitch model and required lock spans before ordering.
To confirm compatibility before ordering, have the following ready: • Exact B&W Tow & Stow model and weight rating • Receiver size, especially whether it is a 3" receiver • Required lock diameter and usable span at each lock point • Photos of the hitch, receiver, adjustment holes, and existing pins • Whether the lock set is for the hitch adjustment points, receiver connection, or both • Any clearance concerns around the receiver tube, hitch head, ball platform, or bumper Why this matters: InfiniteRule lock sets are application-specific. The wrong pin diameter or span may prevent the lock from installing or may leave too much slack for a secure fit.
Match this set by B&W Tow & Stow model, receiver size, lock diameter, usable span, number of lock points, and lock-head clearance. Do not select by “hitch lock set” wording alone.
If the lock set does not fit, verify hitch model, receiver size, pin diameter, usable span, lock location, and whether each lock is being used in the correct position.
Hitch locks are security accessories and do not increase towing capacity. Always verify hitch rating, trailer weight, tongue weight, receiver capacity, ball size, coupler latch, safety chains, wiring, and brake system before towing. Do not tow if a lock, pin, hitch, receiver, or ball mount is damaged, loose, improperly installed, or not rated for the application.