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LockNLube

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: 3992963

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Details

Brand
LockNLube
Item dimensions L x W x H
3.45 x 0.63 x
Exterior Finish
Uncoated Metal
Maximum Operating Pressure
10000 Pound
Number of Ports
2
Global Trade Identification Number

💪Rated up to 10,000 PSI pressure

🔒Locks securely on Zerk fittings

🔧Rebuildable with included spare kit

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 in your maintenance game!

UNIVERSAL COMPATIBILITY - Fits all 1/8" NPT grease guns—manual, pneumatic, or battery-powered—upgrade any tool effortlessly.
LOCK LOAD WITH CONFIDENCE - Patented locking jaws keep the coupler firmly attached—no more grease spills or fumbling hands.
BUILT TO LAST BUILT TO PERFORM - Rebuildable design with a spare kit means double the value and longevity for your grease gun setup.
EFFORTLESS OPERATION UNDER PRESSURE - Thumb lever control lets you lock and release quickly—even when grease lines are pressurized.
WORKS SEAMLESSLY ON ALL ZERK FITTINGS - SAE & metric adapters included to tackle any machine maintenance challenge with ease.

The LockNLube Grease Gun 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 grease spills by locking firmly in place, allowing hands-free operation. Compatible with all 1/8" NPT grease guns—manual, pneumatic, or battery-powered—it includes a rebuild kit for extended tool life and comes with adapters for SAE and metric fittings. Compact and durable, it’s backed by a 1-year warranty, making it the ultimate upgrade for professional-grade machinery maintenance.

Specifications

Brand	LockNLube
Item dimensions L x W x H	3.45 x 0.63 x 1.66 inches
Exterior Finish	Uncoated Metal
Maximum Operating Pressure	10000 Pound per Square Inch
Number of Ports	2
Global Trade Identification Number	00810102950260
Manufacturer	LockNLube
UPC	810102950260
Model	LockNLube Grease Coupler
Item Weight	4 ounces
Product Dimensions	3.45 x 0.63 x 1.66 inches
Item model number	1/8\\\" NPT
Is Discontinued By Manufacturer	No
Manufacturer Part Number	GC81011

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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