CURT 5/8" Barbell Hitch Lock for 2" Receivers, Black — 2.85" Pin, Powder-Coated Steel

CURT 23518 is a 5/8" diameter barbell-style hitch lock designed to secure a 2" receiver, locking your ball mount or hitch accessory in place and deterring theft.

When hooking up a trailer, the fastener through a receiver tube is the only thing keeping your ball mount and trailer connected to your tow vehicle. The CURT 23518 hitch lock replaces a standard pin and clip with a keyed, barbell-style locking device built from high-strength steel and finished in a corrosion-resistant powder coat. It fits 2" x 2" receivers with a 5/8" hole (not compatible with double-walled receiver tubes) and includes features meant to withstand weather and casual theft attempts.

How does this hitch lock improve towing security?

The CURT barbell design prevents simple removal of your ball mount by replacing a removable pin with a locked assembly that requires a key. Its robust steel construction and visible locking end make it a clear theft deterrent while the keyed mechanism secures the connection point between vehicle and trailer.

• 5/8" pin diameter specifically for 2" receiver holes
• Barbell shape prevents easy access to the locking mechanism
• Key-operated 1/4-turn lock for quick activation
• High-strength steel and powder coat resist tampering and wear

Will this lock fit my hitch and how long is the usable pin?

This model fits standard 2" x 2" receiver tubes with a 5/8" fastener hole; it will not work with double-walled receiver tubes. The usable pin length is 2.850", which accommodates most ball mounts and hitch accessories designed for 2" receivers.

• Usable pin length: 2.850"
• Pin diameter: 5/8" (0.625")
• Compatible with single-walled 2" receivers only
• Not compatible with double-walled receivers or oversized accessories

How does the CURT lock handle weather and maintenance?

The lock includes a watertight dust cap that shields the internal mechanism from moisture and debris. Combined with a durable powder coat finish and solid steel core, the lock is built to resist corrosion and maintain smooth operation with minimal upkeep.

• Watertight dust cap protects internal components
• Powder coat finish reduces surface rust
• Two keys included for a spare or secondary user
• Simple 1/4-turn action minimizes mechanical wear

Can this be used with other trailer security devices?

Yes — pairing a CURT hitch lock with a coupler lock provides protection at both vehicle and trailer sides of the connection. Combining devices helps deter opportunistic thieves and adds redundancy so one compromised component doesn't leave your trailer vulnerable.

• Works alongside coupler locks for dual-point security
• Two keyed keys included for sharing or backup access
• Visible deterrent reduces theft risk when parked
• Easy to install/remove when towing or storing

Who is this for: The CURT 23518 is made for trailer owners, campers, boaters, ATV haulers and anyone who uses a 2" receiver and wants a stronger, keyed alternative to a pin and clip. It's suitable for people seeking a low-maintenance, visible theft deterrent that fits standard single-walled 2" receivers and provides durable, weather-resistant locking security for everyday towing needs.