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LockNLube® Grease Couplers

LockNLube Grease Gun Coupler

Save time. Save grease. Save money.

SKU: GC81011

1505 reviews
  • Locks on, does not leak. Rated up to 10,000 PSI
  • 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
  • World's original locking grease coupler.
  • World's only rebuildable grease coupler. Lowest lifetime cost.
  • Easily releases from clogged grease fittings, even under pressure
  • Patented Locking Technology. US Patent #8955544

Size

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30-DAY MONEY-BACK GUARANTEE • 1-YEAR WARRANTY


The LockNLube® Grease Coupler is compatible with all grease guns and grease fittings. It does not leak once locked on and will not pop off under pressure. No hands are needed to align or hold the coupler in place while greasing. You have both hands free to operate your grease gun and know that the grease will go in, not on, your machine. Guaranteed.

It has a unique sliding sleeve, activated by a thumb lever. The sleeve locks the four spring-steel jaws onto the Zerk fitting, and releases the jaws by pushing on the thumb lever. When the jaws are locked onto the Zerk, a leak-proof seal is created. The locked connection is positive and rigid preventing the coupler from coming loose and breaking the leak-proof seal. If a fitting becomes pressurized, especially a recessed one, just depress the thumb lever and release the coupler.

The LockNLube® Grease Coupler is fully rebuildable. If it starts to leak, you simply replace the seal and jaws and it is as good as new. See our tutorial here. We include a free replacement seal and jaws with every coupler that we sell. Additional Seal Kits are also available from our store.

REVIEWS

To see video reviews and read more customer comments, click here.

 

RETURNS

LockNLube provides a full 30-day money-back guarantee on all products purchased from its website. If you are dissatisfied with your purchase, you can return it to us by shipping the item back within 30 days of purchase. Once we receive your return, we will refund you the full purchase price of the item.

Please ensure that the item you are returning is repackaged securely, with all its component parts included. Please also include any documentation that came with your original order, such as a packing slip or order confirmation.

SHIP YOUR ITEM BACK TO US

Return items to us by shipping to:

Lock and Lube
21 Technology Drive Suite #2
West Lebanon, NH 03784

For more information, please call 603.795.2298. We’re a small business and we’ll pick up the phone in New Hampshire when you call.

FEATURES + BENEFITS

  • Works with all grease gun types: pneumatic, manual and electric.
  • Works on all Metric and SAE specification Zerks (grease nipples).
  • Fits 1/8-inch NPT thread.
  • Works with all grease gun manufacturers, including: Lumax, Alemite, Plews lubrication (Edelmann), Grainger, SKF, Macnaught, ADT, Milwaukee, John Deere, Wilmar, Legacy, Allstar, Sealey, Draper and many others.
  • Simply depress trigger to release, even under pressure.
  • No need to hold while greasing. Lock-on and free up both hands to operate your grease gun.
  • Durable nitrile rubber seal for longevity under high pressure.
  • Four hardened spring steel jaws are resilient under high pressure.
  • Check valve to reduce leakage.
  • Suitable for high-pressure, heavy duty applications.

 

KEY SPECS

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: ⅗ x H: 1⅗ In (L: 88 x W: 16.4 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
Customer Reviews
5.0 Based on 1505 Reviews
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DD
07/20/2020
dana D.
United States United States
Best tool ever

Awesome tool! Finally get grease into my positive lube spindles,and Not all over the grease zero.

JM
07/17/2020
Joseph M.
United States United States
Grease coupler

It works as advertised

RR
07/16/2020
Ryan R.
United States United States
Grease gun coupler

I bought two of the lock n lube couplers after I saw my cousin use a grease gun for the first time in years. This is by far the best product I’ve purchased in a long time. It’s very simple to use and works exactly how the video shows .

GD
07/16/2020
Greg D.
United States United States
Great product

I had a farmer/friend recomend Lock n Lube, so I purchased two couplers for each of our grease guns. One is air and the other is battery powered. They have made our job easier and cleaner.

RY
07/15/2020
Robert Y.
United States United States

I love it. I had been given another similar product, but the head was too large to fit in some of the protected opening on my mini excavator. I recommend this product to everyone I can

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