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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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.

4.7/5
Product ID: 3992963
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💪Rated up to 10,000 PSI pressure
🔒Locks securely on Zerk fittings
🔧Rebuildable with spare kit included

Description

🔧 Lock it tight, grease it right—never miss a beat!

  • HANDS FREE EFFICIENCY - Stay focused—locks on so you can use both hands on your grease gun, no slipping or leaks.
  • UNIVERSAL COMPATIBILITY - Fits all grease guns—manual, pneumatic, or battery-powered—upgrading any setup instantly.
  • PRESSURE PROOF PERFORMANCE - Engineered to handle up to 10,000 PSI, ensuring peak performance on any machine.
  • LOCK LOAD WITH CONFIDENCE - Patented jaws lock tightly on all SAE & Metric Zerk fittings for leak-free greasing.
  • BUILT TO LAST BUILT TO REBUILD - Includes a spare rebuild kit, doubling your value and extending tool life effortlessly.

The LockNLube Grease Gun Coupler is the world’s best-selling original locking coupler designed to securely attach to all SAE and Metric Zerk fittings. Rated for up to 10,000 PSI, it offers leak-free, hands-free greasing compatible with all grease guns—manual, pneumatic, or battery-powered. This durable, rebuildable tool includes a spare rebuild kit and is backed by a 1-year warranty, making it the ultimate upgrade for professional maintenance efficiency.

Specifications

ManufacturerLockNLube
BrandLockNLube
ModelLockNLube Grease Coupler
Item Weight4 ounces
Product Dimensions3.45 x 0.63 x 1.66 inches
Country of OriginSouth Africa
Item model number1/8\\\" NPT
Is Discontinued By ManufacturerNo
Manufacturer Part NumberGC81011

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?

Reviews

4.7

All from verified purchases

B**J

Almost what I needed.

I bought this to replace the wonky coupler on a Performance Tool grease gun I bought new recently. This item installed easily, and seems to be well made. Now, if you have heavy equipment, or farm equipment, I can see where this would be a major time and aggravation saver. For automotive stuff I would urge caution. It simply will not lock on to the zerks on my u-joints on a 2002 Ford F-150. The coupler is too fat. I will have to remove one of the 12mm bolts on the yoke to be able to lock this on. In other words if your zerk is a straight shot this will work, in a tight spot its width (and longer length than an ordinary coupler) will work against you. I gave it five stars because on ball joints, and tie rod ends its the bomb! For that alone its worth it to me. Some things under a truck are difficult to hold a ordinary coupler and pump the grease gun at the same time, thats where this product shines.

T**O

100% worth every penny

I was ready to give up and could not figure out why the grease wouldn't go into the fitting. I bought two grease guns and neither worked. My last hope was buying this thing and it was kinda pricey but not more than any alternative and it worked perfect right away.. this thing is awesome

C**S

Locked n Lubed Greased Er

Gripped on tight to the bulging zerk and didn’t let go till she was filled. Gets er greased up good! Works great!

B**Y

Almost mandatory

This is what all good grease guns should come with. Works flawlessly a it should. No wasted grease because the coupler comes off. Even stalling the grease gun on a blocked fitting still allows for easy removal.Top of the line product.

J**Y

Works good and nice design

Worked excellent on auto grease fittings but on my boat fittings it couldn't seal and get grease in. Maybe the boat zerks are too old but grease didn't go in just went all over the outside but overall seems to be a very nice piece.

M**2

Just as advertised!

Just get it. Don't even think about it. A little pricy but saves so much frustration. Used it on my 38 year old sterndrive; four fittings, narrow galleries. Takes a lot of pressure to load. All four took grease, no problem. No leaks, no mess. Clamped on easy. With the original coupler on my grease gun (made in...guess) grease just shot out side.

B**N

The only thing I can complain about is the price!

This is a great product that stays on the zerk fittings. You can lock on those hard to access zerks and then use both hands to pump the grease. While most zerk fittings are no big deal there are always a few that are harder to access and pop off as you pump. This even makes using a powered grease gun a real viable option too as other fittings seem to pop off when the grease goes in under pressure. I think the product is super over priced but being that no other product solves the problems this does unfortunately I have to recommend it. It’s at lest seems to be a high quality build! But if you see this at $20 or $25 buy it. $40 seems just to be expensive IMO but even at that price I would buy it again.

B**Y

Absolutely worth the price.

Where has this been all my life? Excellent fitting. All grease guns should come with this or similar fitting. It simply works. I thought I was doing something wrong all the years of my life. I could never get grease INSIDE the zerts fittings, always all around the outside. This is worth the expense, take my word for it and thank me later.

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TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Trustpilot

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Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Locknlube Grease Gun Coupler Locks Onto Zerk Fittings Grease Goes | Desertcart UAE