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LockNLube Grease Gun Coupler

Save time. Save grease. Save money.

SKU: GC81011

As seen on

2040 reviews
  • Locks on, does not leak. Rated up to 10,000 PSI
  • Easily disconnects, even under pressure. No more broken Zerks
  • 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.
  • Includes a rebuild kit! The LockNLube® is the world's only rebuildable grease coupler. Lowest lifetime cost.
  • Patented Locking Technology. US Patent #8955544
  • As seen on TruckU on the Motortrend Channel!

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 rebuild kit with every coupler that we sell. Additional rebuild 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
12 Commerce Ave. Suite #3
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: 5/8 x H: 1⅗ In (L: 88mm x W: 16mm 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 2,040 Reviews
5 ★
97% 
1969
4 ★
3% 
58
3 ★
0% 
6
2 ★
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Customer Photos
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AL
04/25/2022
Andy L.
United States United States

Love and lock grease gun fitting

I liked it when I used to grease my race car

WH
06/23/2022
William H.
United States United States

Great item

Have many deep recessed zeros on construction equipment. Fitting locks on in deep recesses and even clears blocked fittings. This is my second coupler

JB
06/21/2022
Jennifer B.
Canada Canada

Happy customer

Excellent I have three couplers now. Cut my greasing service time in half. Even with a new Lincoln coupler and grease nipple I had cyl that would only take 4-5 shots then just leak out between nipple and coupler. Now I can pump 12 shots no waste or mess. These things are amazing thx Byron. B.Bandet & Sons Logging

LW
06/21/2022
Lloyd W.
Canada Canada

Very satisfied and saves grease as stated. Just found a couple tight places where it is difficult to get onto the zert.

DM
06/21/2022
Donald M.
Canada Canada

Owner Operator

It worked really good it’s fantastic if you’re a machine operator I would definitely buy one it makes it so much easier you don’t need your hand holding the grease gun with pressure on the fitting so much easier

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