CURT Trailer Hitch Lock - Stainless Steel Barbell Style, 1/2" Pin with 5/8" Adapter for 1-1/4" & 2" Receivers, Watertight Caps

CURT 23580 is a stainless-steel barbell-style trailer hitch lock with a 1/2" pin and a 5/8" adapter sleeve that secures either 1-1/4" or 2" receiver tubes to deter theft and prevent unauthorized removal of your ball mount or hitch accessory.

This compact locking pin replaces a standard hitch pin and clip to provide a keyed security solution for tow vehicles, campers, boats and utility trailers. Built from stainless steel with watertight dust caps and a simple 1/4-turn key mechanism, the CURT 23580 aims to combine corrosion resistance, ease of use and wide compatibility so you can leave your trailer or accessory attached with greater peace of mind.

How does the CURT 23580 stop someone from stealing my ball mount?

The barbell-style design prevents the removal of the ball mount by blocking the receiver's fastener hole with a locked pin and end caps. It is key-operated, requiring an authorized key and a 1/4-turn to open, making quick theft attempts impractical.

• Stainless-steel construction resists prying and corrosion.
• Barbell shape conceals the mounting hole and resists tampering.
• Keyed lock with 1/4-turn activation for fast securing and removal.
• Two keys included for backup or shared access.

Will this lock fit my hitch receiver and accessories?

Yes — the CURT 23580 ships with a 1/2" diameter locking pin plus a 5/8" adapter sleeve so it works with both common receiver sizes. That makes it compatible with most 1-1/4" and 2" receivers and a wide range of Class 1 through Class 5 ball mounts and hitch accessories.

• 1/2" pin plus 5/8" adapter for flexible fitment.
• Designed for 1-1/4" and 2" receiver tubes commonly found on trailers and trucks.
• Works with ball mounts, bike racks, and other hitch-mounted cargo carriers.

How well does it hold up to weather and roadside conditions?

Constructed from stainless steel and supplied with watertight dust caps, the CURT 23580 is built to resist rain, road grime and salt that commonly accelerate corrosion. The dust caps shield internal lock components so the mechanism remains functional after exposure.

• Stainless-steel body for long-term corrosion resistance.
• Watertight dust caps protect internal lock mechanism from moisture.
• Durable finish preserves appearance and reliability in outdoor use.

How easy is it to use day to day?

The lock uses a straightforward key action with a 1/4-turn to secure or release the pin, making installation and removal quick even when loading or unloading. Two keys are included so you can keep a spare in a safe place or give one to a trusted helper.

• Simple 1/4-turn key activation for quick operation.
• Two keys included for convenience and redundancy.
• Barbell form factor installs like a standard hitch pin—no special tools required.

Who is this for: The CURT 23580 is intended for vehicle owners who tow an ATV, boat, camper, utility trailer or use hitch-mounted cargo and want stronger theft deterrence than a standard hitch pin. It’s a practical upgrade for owners seeking broad receiver compatibility, corrosion-resistant construction and a fast, key-operated locking solution without modifying the hitch or accessory.