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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.

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.

Q: Does this work with Milwaukee grease guns?

This does not work on the older Milwaukee m18 grease guns. They used a metric threaded hose on the older ones. The newer guns have standard thread and it will fit those. Take the current connector off the end of your grease gun hose. If the first 1/8 inch of the hose is not threaded, then you have a metric hose and this lock lune will not fit.

Q: Where is this product manufactured?

It is a quality product made in South Africa by Gurtech.

Q: After installing it, I couldn't depress the gun's pump. What did I do wrong?

Between myself and friends we have successfully installed five of these fittings without any problems. As per the other reviews, I would first check your gun to see if was in fact pumping grease, then reinstall the coupler and try again, before you put it on a fitting. Could be that the fitting jerk that you tried it on was frozen. If it still does not allow grease to flow, it is defective and you will need to return it.

Q: It is just the fitting or does it include the flexible line?

It is just the fitting. The hose was included to give context and sense of scale.

Product ID: 266903180

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Details

Material
Metal
Brand
LockNLube
Item dimensions L x W x H
8.8 x 1.6 x
Exterior finish
Uncoated Metal
Inlet connection type
Press

💪Rated up to 10,000 PSI pressure

🔒Locks securely on Zerk fittings

♻️Rebuildable with spare kit included

Frequently Bought Together

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.

LockNLube 90 Degree Grease Coupler Adapter

LockNLube Pressure Return Valve for Use with Cordless Grease Guns. No More Pressure Locks! Returns Grease to The Tube. Releases Hose backpressure.

Description

🔧 Lock it tight, grease it right—never miss a beat on your machine maintenance!

UNIVERSAL COMPATIBILITY - Works seamlessly with all grease guns—manual, pneumatic, or battery-powered—and fits SAE & metric fittings.
POWERHOUSE PRESSURE RATING - Handles up to 10,000 PSI, making it the toughest coupler for any professional-grade grease gun.
LOCK LOAD WITH CONFIDENCE - Securely locks onto all Zerk fittings for leak-free greasing—no more mess or wasted time.
EFFORTLESS ONE HAND OPERATION - Patented thumb lever design lets you lock and release quickly, freeing your other hand for precision work.
DOUBLE THE VALUE DOUBLE THE LIFE - Includes a rebuild kit so you get two couplers in one—sustainability meets savings.

The LockNLube Grease Coupler is the world’s best-selling original locking coupler designed to securely attach to all Zerk fittings. Rated for up to 10,000 PSI, it prevents leaks and mess by locking on tight, allowing hands-free operation. Compatible with all grease guns and fittings, it includes a rebuild kit for extended tool life, backed by a 1-year warranty—engineered for professionals who demand reliability and efficiency.

Specifications

Manufacturer	LockNLube
Brand	LockNLube
Model	LockNLube Grease Coupler
Product Dimensions	8.76 x 1.6 x 4.22 cm; 113.4 g
Item model number	1/8\\\" NPT
Exterior	Uncoated Metal
Manufacturer Part Number	GC81011
Item Weight	113 g

Have a Question? See What Others Asked

Does this work with Milwaukee grease guns?

Where is this product manufactured?

After installing it, I couldn't depress the gun's pump. What did I do wrong?

It is just the fitting or does it include the flexible line?

Common Questions

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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€ 65.96

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