CZC AUTO Trailer Tongue Coupler Lock 1/4" Dia 7/8" Span - Keyed-Alike Set, Corrosion-Resistant

CZC AUTO Trailer tongue coupler lock is a 1/4" diameter, 7/8" span keyed-alike locking pin designed to secure latch-type trailer couplers against unauthorized detachment and corrosion.

This compact coupler locking pin replaces the factory latch pin to add a simple, durable layer of security for boats, RVs, utility trailers, and cargo haulers. Built from high-strength steel with a black electrophoretic finish and a zinc-alloy tubular core, the lock is engineered to resist rust and everyday wear while fitting common latch-style couplers. Two keyed-alike pins are included, and a watertight rubber cap keeps debris and moisture out of the mechanism.

How does this coupler lock fit my trailer?

The CZC AUTO pin is sized for latch-type couplers that accept a 1/4" diameter locking pin and need an effective span of about 7/8" (pin head length ~0.97", bottom ~0.95"). Always measure your coupler pin hole and clearance before ordering to ensure compatibility. Incorrect sizing will prevent the lock from seating or functioning properly.

• Nominal pin diameter: 1/4" (0.25 in)
• Effective span/length: 7/8"
• Head length: 0.97"; bottom length: 0.95"
• Best for latch-style couplers on boats, trailers, RVs, and trucks

What materials and construction protect the lock from weather and tampering?

This locking pin combines a high-strength steel shaft with an electrophoretic black coating to slow corrosion and surface wear. The locking core is zinc alloy tubular construction for sturdiness, and a rubber dust cap seals the keyway against rain, snow, ice and road grime. These elements together increase longevity and help deter casual theft attempts.

• High-strength steel body for mechanical durability
• Electrophoretic black finish for corrosion resistance
• Zinc-alloy tubular lock core and solid round keys for reliability
• Watertight rubber cap protecting the keyway from debris and moisture

How simple is it to use and maintain the CZC AUTO coupler pin?

The lock is made for quick everyday operation: insert the pin, turn the key a quarter-turn to lock, and the pin pops up when unlocking for easy removal. Routine care is minimal — occasional lubrication of the keyway and rinsing of the rubber cap after heavy exposure will keep the mechanism smooth. The keyed-alike set means both pins open with the same key, saving time when you carry multiple trailers.

• One-quarter turn to lock or unlock; pin pops up when released
• Two keyed-alike pins included for convenience
• Low-maintenance: clean and light lubrication as needed
• Rubber cap reduces need for frequent internal cleaning

What warranty and customer support does CZC AUTO provide?

CZC AUTO backs this coupler locking pin with a customer-friendly return and warranty policy: a 30-day money-back option for any reason and a 12-month warranty for quality-related defects. If you encounter fitment or performance issues, CZC AUTO commits to a prompt response and troubleshooting support to resolve concerns within 24 hours.

• 30-day money-back guarantee
• 12-month warranty for manufacturing or quality issues
• Customer support promise: response within 24 hours
• Contact CZC AUTO for fitment help before installation

Who is this for: This coupler lock is intended for trailer owners who want a compact, corrosion-resistant locking pin for latch-style couplers — ideal for boat owners, RV and utility-trailer users, and anyone who needs a keyed-alike set for multiple trailers. Verify your coupler's hole diameter and required span before purchase to ensure a reliable fit and trouble-free operation.