LockNLube® Grease Coupler
SKU: GC81011
🚚 This item includes FREE shipping
- Completely hands-free and leak-free lock
- Easily disconnects, even under pressure
- Works on all Zerk fittings, SAE and metric
End greasing frustration with the original locking grease coupler!
- Locks on, stays on, won't leak. Rated up to 10,000 PSI
- Easily disconnects, even under pressure. No more broken Zerks
- 1/8" NPT compatible with all grease guns - battery, pneumatic, manual
- Grease goes in, not on, the machine
- Works on all Zerk fittings, SAE and metric
- Available with or without a spare rebuild kit! The LockNLube® is the world's only rebuildable grease coupler. Lowest lifetime cost.
- Patented Locking Technology. US Patent #8955544
- As seen on TruckU on the Motortrend Channel!
This item ships FREE!
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.
- Reviews
- Questions
- grease
- coupler
- Works
- fittings
- locknlube
- mess
- equipment
- tractor
- zerk
- tool
Locks right on
We picked up a couple of these for the farm and they are fantastic. It locks right on to the grease zerk without excessive force. Makes greasing much easier, no more busted knuckles from pulling the coupler off in tight spots.
Wish I had purchased sooner
I saw this online and I thought I would try it. I wish I would have purchased this earlier. It stays on the zerk and I am not wasting any more grease. It works great on my Lincoln Power Luber.
Worth it
It’s one of those things that you wish that you’d found MUCH sooner. Fighting with trying to hold on slippery, greased up hoses and jamming them on zerks as you try and pump the gun (or squeeze the trigger) can’t be anything that one would enjoy. With the Lock-N-Lube I just snap it on and use both hands on the grease gun. A LOT less messy. I can now save cuss words for something else!
Works Great Every Time
I bought one of these at a logging show and couldn’t wait to get to the woods and try it. It works great every time. Since then all of my grease guns have one and I wouldn’t have a gun without it. I even bought a few extra to give to friends.
Best product I have ever purchased
best product i have ever purchased , wish i had a long time ago, small price for what you save in wasted grease, LOVE IT !!!!!!!!!!!!!!!!!!!!!!!