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

• LOCKS ON, STAYS ON, WON'T LEAK—LIKE HAVING AN EXTRA HAND! No need to hold the coupler in place while trying to grease your machinery. The LockNLube Grease Coupler locks on tight and lets you use both hands on your grease gun.
• THE ONLY REBUILDABLE LOCKING COUPLER: We include a spare rebuild kit! It's like getting two couplers for the price of one.
• 1/8" NPT COMPATIBLE WITH ALL GREASE GUNS – BATTERY, PNEUMATIC, MANUAL: Whether you are using Grandpa’s old Alemite lever grease gun, or the latest battery or pneumatic grease guns, the LockNLube Grease Coupler can be added to upgrade your grease gun.
• WORKS ON ALL ZERK FITTINGS, SAE & METRIC with a full lineup of adapters to reach any grease fighting on any machine!
• EASY TO USE: Press the thumb lever to open the LockNLube’s patented jaws and attach to the Zerk. Release the thumb lever and the LockNLube locks on tight! Press the thumb lever again to easily release from the Zerk, even under pressure!
• RATED UP TO 10,000 PSI
• BEST BUILT GUARANTEE: The LockNLube Grease Coupler is covered by our unconditional 1-year warranty

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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 Zerks
• COMPATIBLE 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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Introducing the LockNLube Grease Coupler

• 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