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All Greasing Products

LockNLube® Grease Coupler

SKU: GC81011

856
  • WIll not leak once locked on.
  • Hands-free, does not release under pressure
  • Rated up to 10,000 PSI.
  • 1/8″ NPT thread. Compatible with all grease guns.
  • Works on all Zerk fittings, SAE and metric.
  • Comes with free replacement seal and jaws. Fully rebuildable. 
  • Easily releases from clogged grease fittings, even under pressure.

FREE U.S. SHIPPING ON ORDERS $25+

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) ⅗ 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

Based on 856 reviews
5 ★
96% 
820
4 ★
4% 
35
3 ★
0% 
1
2 ★
0% 
0
1 ★
0% 
0
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BB
03/20/2019
Brad B.
United States

Grease coupler

The best tool I have purchased in a long time!

RZ
03/19/2019
Rocky Z.
United States

It works great

It works great

GV
03/19/2019
Gerardo V.
United States

Great product

Awesome does everything it’s said it would do . When I get grease fitting that won’t take grease I put the Cupler On my hose to my Porter power and pump hydraulic oil in to the grease fitting which Usually breaks loose Plug hole instead of pulling the pin with no leaks or popping off

MR
03/18/2019
mike r.
United States

It very well made did

It very well made did the job with no mess

KF
03/18/2019
KEN FIELDS

WOW!!!!

I ONLY REGRET NOT HAVING A GREASE COUPLER FOR THE PAST 25 YEARS, I"M EXTREME;Y SATISFIED WITH HOW MUCH IT HAS MADE MY JOB SO MUCH EASIER.

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