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.
To see video reviews and read more customer comments, click here.
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.
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.
|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|
Works as advertised
Great so far. I’ve only used it once and there were no hard to get to zerks It’s very easy to use and seals around the zerk so there is no waste. We’ll see how it goes from here. I don’t think I can get to all the places that need to be greased.
To be honest the Lock n Lube coupler was really just an impulse buy made in a moment of weakness brought on by the intoxicating charm of that model you use in all your videos. That guy has the knee-weakening good looks of Idris Elba, just a shorter, scrawnier, whiter version. I was pleasantly surprised to find out that the couplers work great too!
Using the LocknLube is great. I wish I had found it 45 years ago. I started greasing things when everything that rolled still had grease fittings.
It was an awesome tool. I love it. It works like it supposed to.i would recommend it.