LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, not on the machine. The original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable tool.

Product description

END GREASING FRUSTRATION The Original LockNLube Grease Coupler

LOCKS ON, STAYS ON, HANDS-FREE: Grease goes in, not on, the machine. Easily disconnects, even under pressure. No more broken ZerksCOMPATIBLE WITH ALL GREASE GUNS AND GREASE FITTINGS: Works with all grease guns and manufacturers . Locks on to all Metric and SAE specification Zerk fittings.

The Original LockNLube Grease Coupler!

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Hands-free, no mess, and no wasted grease! The only fully rebuildable grease coupler, available with or without a rebuild kit. Rated to 10,000 PSI. Perfect for recessed fittings. Easily disconnects, even under pressure. No more broken Zerks.

End greasing frustration with the original locking grease coupler!

Locks on-Stays on-Won’t leak

Easily disconnects, even under pressure. No more broken Zerks. 1/8″ NPT compatible with all grease guns – battery, pneumatic, manual.

Includes a rebuild kit

The only fully rebuildable grease coupler, available with or without a rebuild kit, extending service life and reducing replacement costs.

Works on all Zerk fittings

Patented Locking Technology (US Patent #8955544) means grease goes in, not on, the machine!

Available in an XL Version

The LockNLube Grease Couler XL (GC81042) has a 2″ longer barrel for those deeply recessed fittings!

Key Specs

MAX PRESSURE 10,000 psi (690 Bar). Locks on, stays on, won’t leak. ZERK COMPATIBILITY The Floating Jaws allows the LockNLube Grease Coupler to adapt to all DIN and SAE specification Zerks (grease nipples). COUPLER THREAD ⅛” NPT female thread compatible with all grease guns – battery, pneumatic, manual DIMENSIONS L: 3½ x W: 5/8 x H: 1⅗ In (L: 88mm x W: 16mm x H: 41 mm) DIAMETER (FRONT OF COUPLER) 5/8 in (16 mm). Fits most recessed grease fittings (Zerks). ~1mm larger than standard coupler WEIGHT 4 oz. (100 grams) GREASE GUN COMPATIBILITY Works with all grease gun types: pneumatic, manual, and electric. SEAL Durable nitrile rubber seal for longevity under high pressure LOCK-ON MECHANISM Four hardened steel jaws are resilient under high pressure. Patent protected. PATENT US Patent #8,955,544

SECURE LOCKING DESIGN: Lock on grease coupler stays attached for leak-free greasing. No need to hold in place, allowing both hands to operate your grease gun with ease and control.
REBUILDABLE FOR LONG LIFE: The only grease gun coupler with a rebuildable locking mechanism. Reduces replacement costs and extends product lifespan for heavy-duty maintenance tasks.
UNIVERSAL NPT COMPATIBILITY: Fits all grease guns with 1/8 in NPT threads, including battery, pneumatic, and manual models. Upgrade your grease gun for reliable performance every time.
FITS ALL GREASE FITTINGS: Works with SAE and metric Zerk fittings. Includes adapters for hard-to-reach spots, making it the best grease gun coupler for versatile equipment maintenance.
SIMPLE ONE-HAND OPERATION: Press the thumb lever to attach or release the coupler, even under pressure. The locking grease fitting ensures quick, easy, and mess-free greasing every use.

Product summary

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