LockNLube® Grease Gun Coupler
🚚 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
Free US Shipping Over $25 • Money Back Guarantee
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
- Includes a 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!
6 reasons why people are switching to the LockNLube® Grease Coupler 🎉
Also available with a 2" longer barrel for those deeply recessed fittings! Click here to purchase your XL Coupler from LockNLube.
Need a longer barrel for extra reach?
LockNLube Grease Gun Coupler XL - Extra reach for recessed grease fittings
$41.99This item ships FREE!
WHAT’S INCLUDED IN THE GREASE COUPLER REBUILD KIT
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. We even include a free rebuild kit with every purchase, and additional kits are available in our store.
It works with all major grease gun brands—LLincoln, 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!
LockNLube® Grease Coupler Care & Maintenance:
Check out our YouTube channel for an easy method to clean dirt and grit out of your coupler. This will extend the life of the seal, which means longer use time between rebuilds. If you find your coupler starting to leak, try this cost-saving tip before you put a rebuild kit in it.
Consider using a Coupler Cap and Zerk Fitting Caps to keep your equipment clean.
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. We even include a free rebuild kit with every purchase, and additional kits are available in our store.
It works with all major grease gun brands—LLincoln, 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!
LockNLube® Grease Coupler Care & Maintenance:
Check out our YouTube channel for an easy method to clean dirt and grit out of your coupler. This will extend the life of the seal, which means longer use time between rebuilds. If you find your coupler starting to leak, try this cost-saving tip before you put a rebuild kit in it.
Consider using a Coupler Cap and Zerk Fitting Caps to keep your equipment clean.
Max pressure | 10,000 psi (690 Bar) |
Zerk Compatibility | Fits all DIN and SAE specification Zerks (grease nipples). |
Coupler Thread | ⅛” NPT female thread. |
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 |
Trying to remove your old coupler and attach the LockNLube® Grease Coupler? Click here.
LockNLube Grease Coupler Spec Sheet
Illustrated Rebuild Kit Replacement Instructions
Grease Coupler Cap
Grease Fitting Caps (50 count)
- 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.
Over 20,000 Five-Star Reviews
OVER 2.3K+ 5-STAR CUSTOMER REVIEWS
A CLOSER LOOK AT THE GREASE COUPLER
Our products are designed to outperform and outlast any other. Return within 1 year for a full refund, no questions asked.
KEY SPECIFICATIONS
Max pressure | 10,000 psi (690 Bar) |
Zerk Compatibility | Fits all DIN and SAE specification Zerks (grease nipples). |
Coupler Thread | ⅛” NPT female thread. |
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 |
- Reviews
- Questions
- grease
- coupler
- Works
- locknlube
- fittings
- equipment
- mess
- tractor
- zerk
- tool
Frustration ended!
My grease gun hose is kind of short and with the regular coupler I had to try to hold it on the zerk with one hand and get the gun against something to pump the handle. Now I can use both hands and so far it hasn't leaked or came off the zerk. It is a bit longer than the old one so I had to change one zerk to 90 degrees to get it in. but that's minor.
I bought a Dewalt battery grease gun with a locking head, I lost 4 tube's of grease with lockhlube 1 zero gave me an issue. (slight)
Serves it’s purpose
Works as intended. Still have excess grease coming out between the finger. It’s definitely easier to grease just equally as messy.
Works as advertised
So far I am very pleased with the lock lube. Once it is locked on the fitting does not allow any leakage.