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.

Where is this product manufactured?

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

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.

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.

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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 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.

Product ID: 3992963

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💪Rated up to 10,000 PSI strength

🔒Locks securely on Zerk fittings

♻️Rebuildable with spare kit included

Description

🔧 Lock it tight, grease it right — the pro’s secret weapon!

DOUBLE THE VALUE - Includes a spare rebuild kit, extending tool life and saving you money.
EFFORTLESS OPERATION - Patented thumb lever design makes locking and releasing quick, even under pressure.
UNMATCHED DURABILITY - Engineered to withstand pressures up to 10,000 PSI for heavy-duty performance.
UNIVERSAL COMPATIBILITY - Fits all grease guns—manual, pneumatic, or battery-powered—for seamless upgrades.
LOCK LOAD WITH CONFIDENCE - Securely locks onto all Zerk fittings, freeing your hands for precision work.

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 offers unmatched durability and universal compatibility with all grease guns. Its patented locking mechanism frees your hands for efficient greasing, while the included rebuild kit ensures long-lasting use backed by a 1-year warranty.

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TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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TrustScore 4.5 | 7,300+ reviews

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Manufacturer	LockNLube
Brand	LockNLube
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

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.

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