LockNLube® Grease Coupler
SKU: GC81068
End greasing frustration with the original locking grease coupler!
Now available without the spare rebuild kit - SAVE!
- Locks on, stays on, won’t leak. Rated to 10,000 PSI – Patented locking jaws grip the Zerk to create a secure, leak-free seal that will not pop off under pressure, enabling true hands-free greasing and cleaner lubrication.
- Easy release, even under pressure. No broken Zerks – Thumb-activated sleeve locks and unlocks quickly with one hand, disconnecting safely without pulling, fighting, or damaging grease fittings.
- Universal 1/8" NPT compatibility – Fits all standard grease guns including battery, pneumatic, and manual models, making it an easy, reliable upgrade for any grease gun.
- Grease goes in, not on, the machine – Internal seal directs grease into the bearing instead of leaking around the fitting, reducing mess, waste, and cleanup while improving lubrication.
- Works on all Zerk fittings, SAE and metric – Designed for universal fit across standard grease fittings for dependable performance on automotive, agricultural, and industrial equipment.
- Rebuildable design. Lowest lifetime cost – The only fully rebuildable grease coupler, available with or without a rebuild kit, extending service life and reducing replacement cost in demanding use.
- Patented and Proven – Featured on TruckU on the MotorTrend Channel, trusted by professionals for reliable, leak-free greasing. U.S. Patent #8,955,544
Free U.S. Shipping on Orders $74+
LockNLube® Grease Coupler
End greasing frustration with the LockNLube® Grease Coupler—the ultimate solution for leak-free greasing. Compatible with all grease guns and grease fittings, it locks on, stays on, and won't pop off under pressure. That means less mess, and less wasted grease.
With its unique sliding sleeve and thumb lever, the LockNLube® Grease Coupler easily locks its four steel jaws onto the Zerk fitting, creating a secure, leak-proof seal. And when you’re done, a simple press of the thumb lever releases the coupler—even under pressure. The perfect solution to greasing recessed fittings that make removing your coupler a zero-breaking chore.
The LockNLube® Grease Coupler is fully rebuildable. If it ever starts to leak, just replace the seal and jaws, and it’s as good as new.
It works with all major grease gun brands—Lincoln, Milwaukee, DeWalt, John Deere, Alemite, Pleas, Legacy, and many more—so you know it’s the right fit for your tools.
Ready to experience the difference? Click here to see video reviews and read customer comments, and get your LockNLube® Grease Coupler today!
Grease Coupler Cap
LockNLube 50 Grease Fitting Caps
- Shipping options are available at checkout
- All of our orders ship out of either our Illinois or New Hampshire warehouse within 3 business days.
- Shipping carrier varies by size and weight of the package.
- LockNLube's shipping department operates Monday through Friday, 8 am to 2 pm EST except for holidays.