LockNLube Grease Gun Coupler — Rebuildable Locking Jaw Coupler, 10,000 PSI, One-Hand Thumb Lever

This quick-connect coupler replaces standard slip-on heads to give you a secure, hands-free connection for battery, pneumatic, or manual grease guns. Its patented locking jaws clamp firmly to SAE and metric Zerk fittings so greasing becomes faster, cleaner, and more controlled. Built to be rebuilt rather than replaced, the coupler lowers long-term costs and stays dependable under heavy use.

How does the LockNLube coupler create a leak-free connection?

The coupler uses patented locking jaws that grab the fitting and hold under pressure, preventing grease spray and drips. Once locked, you can release the other hand to operate the gun or steady the part being serviced.

• Patented jaw mechanism locks onto Zerk fittings for a tight seal
• Rated to 10,000 PSI to withstand high-pressure greasing tasks
• Thumb lever latches and releases the lock with one hand
• Adapters included for awkward or recessed fittings

Will this coupler work with my grease gun and fittings?

Yes — the LockNLube coupler threads into any grease gun with a 1/8 in NPT outlet, including manual, electric, and pneumatic models. It is compatible with both SAE and metric Zerk fittings, so it suits a broad range of vehicles and equipment.

• 1/8 in NPT universal thread fits most grease guns
• Works with SAE and metric grease fittings (Zerk/grease nipples)
• Includes adapters for hard-to-reach or recessed fittings
• Swaps quickly with standard couplers for easy upgrades

How durable is the LockNLube coupler and can it be repaired?

The LockNLube coupler is designed to last and to be rebuilt rather than discarded. Replaceable internals keep the coupler performing like new and reduce the total cost of ownership for technicians and shop owners.

• Rebuildable locking mechanism extends service life
• Heavy-duty materials rated for 10,000 PSI operating pressure
• Simple field maintenance avoids frequent full replacements
• Designed for frequent, heavy use in professional settings

How does one-hand operation improve the greasing process?

With the LockNLube thumb lever you can lock and unlock the coupler while keeping your other hand free to operate the grease gun or stabilize the component. That single-handed control reduces mess, speeds tasks, and improves safety when working on machinery.

• Thumb lever attaches/releases coupler with one hand
• Hands-free locked connection reduces grease spray and drips
• Speeds routine maintenance and minimizes contamination
• Useful when working in tight spaces or on elevated equipment

Who is this for: The LockNLube Grease Gun Coupler is ideal for fleet mechanics, agriculture and construction technicians, industrial maintenance crews, and serious DIYers who demand a reliable, serviceable coupler. If you want faster, cleaner greasing with a long-lived tool that fits standard grease guns and both SAE and metric fittings, this coupler is built for that purpose.