Two-piece stainless steel keyed lock set for compatible Curt 2" Alumalite adjustable hitches used with 2-1/2" receivers, including one hitch adjustment lock and one receiver lock.
The InfiniteRule 61420-S is a two-piece keyed lock set designed for compatible Curt 2" Alumalite adjustable hitch setups used with a 2-1/2" receiver. It includes one hitch lock for the adjustable ball mount section and one receiver lock for securing the hitch shank in the receiver.
This set is meant to secure both major lock points on the matching Curt Alumalite towing setup: the adjustable hitch/ball mount position and the receiver connection. Both locks use 5/8" diameter stainless steel locking pins, but the two locks have different usable spans, so each should be used only in the intended location.
Includes one hitch adjustment lock and one receiver lock
Designed for compatible Curt 2" Alumalite adjustable hitch setups
Both included locks use 5/8" diameter locking pins
Corrosion-resistant construction for towing and outdoor exposure
InfiniteRule 61420-S is listed for use with the Curt 2" Alumalite adjustable hitch and a 2-1/2" receiver. It should not be assumed to fit every Curt adjustable hitch, every 2" hitch, every 2-1/2" receiver, trailer couplers, trailer doors, or universal towing applications. Verify the hitch brand/model, receiver size, pin diameter, required span for each lock point, shank size, adjustment channel width, and lock-head clearance before ordering.
Before Starting: Confirm the hitch is the compatible Curt 2" Alumalite adjustable hitch setup and that the receiver is the correct 2-1/2" receiver application. Inspect the hitch, receiver, adjustment holes, and shank holes for damage, rust, deformation, or misalignment before installing the locks. Basic Use Steps: 1. Install Hitch Shank: Slide the compatible hitch shank fully into the 2-1/2" receiver and align the receiver pin holes. 2. Secure Receiver Lock: Use the included 5/8" x 3-1/8" span receiver lock to secure the hitch shank to the receiver. 3. Set Hitch Height: Position the adjustable Curt Alumalite ball mount/platform at the desired height according to the hitch manufacturer’s instructions. 4. Secure Hitch Lock: Use the included 5/8" x 4-1/8" span hitch lock in the adjustable hitch lock point. 5. Confirm Lock Engagement: Make sure both lock heads are fully seated and secured with the key. 6. Install Dust Covers: Seat the non-locking dust covers to help protect the lock cylinders from water, dirt, and road grime. 7. Inspect Before Towing: Confirm the hitch, receiver, ball mount, and locks are properly installed and rated for the towing setup. 8. Store Keys Safely: Keep spare keys in a secure location and record the key number if provided.
Package Contents: • 1 InfiniteRule 5/8" hitch lock with 4-1/8" span • 1 InfiniteRule 5/8" receiver lock with 3-1/8" span • Keyed lock assemblies • Non-locking dust covers • Keys as supplied by manufacturer or distributor packaging NOT Included — May Also Need: • Curt Alumalite adjustable hitch • Trailer hitch receiver • Hitch ball or ball mount platform • Trailer coupler lock • Trailer latch lock • Anti-rattle device • Safety chains, wiring, or towing hardware This listing is for the two-piece hitch and receiver lock set only unless otherwise stated. Confirm the exact Curt hitch model, receiver size, pin diameter, and required spans before ordering.
To confirm compatibility before ordering, have the following ready: • Hitch brand and model, specifically whether it is a Curt Alumalite adjustable hitch • Receiver size, especially whether the setup uses a 2-1/2" receiver • Pin diameter at both lock points • Required span for the hitch adjustment lock point • Required span for the receiver lock point • Photos of the hitch adjustment holes and receiver pin hole area • Whether you need a hitch adjustment lock, receiver lock, coupler lock, or trailer latch lock Why this matters: This kit includes two locks with different spans. Using the wrong lock in the wrong location or ordering for the wrong hitch model may cause fitment or safety issues.
Match this set by Curt Alumalite hitch model, receiver size, pin diameter, lock span at each location, and lock-head clearance. Do not select it as a universal 2" trailer coupler security kit.
If fitment or locking issues continue, check the Curt hitch model, receiver size, pin diameter, lock span at each location, lock-head clearance, and whether a different InfiniteRule kit is required.
Always confirm the hitch locks, hitch receiver, adjustable ball mount, hitch ball, trailer, and towing vehicle are properly rated and compatible for the towing setup. These locks help secure compatible hitch components, but they do not increase towing capacity, correct an overloaded trailer, replace safety chains, or fix an improperly matched towing system. Inspect both locks before each trip and do not tow with damaged, mis-sized, loose, or improperly installed towing hardware.