METOWARE Trailer Tongue Coupler Lock 1/4" Dia, 3-1/2" Span

METOWARE Trailer Tongue Coupler Lock is a compact, heavy-duty hitch pin assembly (1/4" diameter, 3-1/2" span) that secures your trailer coupler with a push-to-lock pin, rotating lock head and waterproof protection.

This trailer coupler lock combines a stout steel pin, a 361° rotating head with a watertight rubber cap, and a reinforced tubular lock core to provide convenient, long-lasting protection for trailers and tongue-mounted accessories. It’s engineered for simple one-handed locking, weather resistance, and durable everyday towing use. The package includes the pin, the lock head assembly and two tubular keys (one spare) so you can secure your rig quickly and keep a backup key on hand.

How does the push-to-lock design simplify hitching and unhitching?

The push-to-lock mechanism lets you secure the pin instantly without fumbling for the key: just push the pin through the coupler and it locks. To release, insert and turn the tubular key slightly and the pin ejects on its own for fast removal. This reduces time at the hitch and makes single-operator hook-ups easier.

• Push-to-lock action for one-handed engagement
• Key turn pops the pin out for quick release
• Spare tubular key included for convenience

Will this lock hold up in wet or corrosive conditions?

Yes — the lock is finished with electrophoretic paint and features a rubber cap over the lock head to keep water and debris out of the keyway. The steel pin and reinforced zinc-alloy tubular core are built to resist rust and maintain smooth operation even when exposed to rain, road salt or snow.

• Electrophoretic coating for corrosion resistance
• Watertight rubber cap protects keyhole from ingress
• Heavy-duty steel construction for long service life

What are the dimensions and compatibility of this hitch pin?

The pin measures 1/4" in diameter with an effective span of 3-1/2", making it suitable for many common trailer couplers and tongue-mounted accessories that accept a quarter-inch pin. Its compact size is easy to carry in a pocket, glovebox or tool bag while still offering robust security for towing needs.

• Pin diameter: 1/4" (0.25 in)
• Effective span/length: 3-1/2"
• Compact and portable for storage in vehicle or trailer

How secure is the tubular lock core and keys?

The lock uses a reinforced zinc-alloy tubular core paired with stronger tubular keys to improve resistance against tampering compared with basic locks. While no mechanical lock is impervious, this design increases pick resistance and provides a reliable deterrent for theft or accidental removal.

• Reinforced tubular lock core for improved security
• Two tubular keys included (one spare) to prevent lockouts
• Robust construction deters casual theft and tampering

Who is this for: METOWARE’s Trailer Tongue Coupler Lock is aimed at boat owners, RV and trailer haulers, landscapers, contractors, and anyone who needs a compact, weather-resistant hitch pin for regular towing. It’s ideal for users who want quick, one-handed locking, corrosion protection for harsh environments, and the peace of mind of a reinforced tubular lock with a spare key.