• End Greasing Frustration

    The world's only rebuildable grease coupler
    Won't leak or pop off under pressure. Guaranteed.
    Works on all Zerk fittings, SAE and metric

    Won’t leak or pop off under
    pressure.     Guaranteed.

    Shop Now
    "I have spent a lot of money on several grease couplers in my search to find the best one. So far the LockNLube Coupler is the best one. I am a dairy farmer and go thru hundreds of grease tubes each year. I had not found a good grease coupler until I used the LockNLube."

    — Jacob B.
    "The Lock N Lube grease couplers are the best thing since buttered bread! Quick, simple and easy attachment and removal. No fighting and no fuss! I only wish I knew about it years ago. If your not using a Lock N Lube grease coupler your missing out. And it's rebuildable if it wears out."

    — Glen R.
    "I've seen these advertised for years, read of people raving about them and finally decided (after 15 years plus) to buy one. OH my I've been missing what I didn't know I was missing, this coupler stays on and so far hasn't bled grease everywhere around the fitting."

    — Rick P.

    THE ORIGINAL LOCKNLUBE® GREASE COUPLER

    Save Time. Save Grease. Save Money.

    Meet the world's best selling locking grease coupler. Patented and sold from our HQ in New Hampshire, the original 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 safely operate your grease gun and know that the grease will go in, not on, your machine. Guaranteed.

    • World's original locking grease coupler.
    • Rated up to 10,000 PSI.
    • 1/8″ NPT thread. Compatible with all grease guns.
    • Works on all Zerk fittings, SAE and metric.
    • Easily releases from clogged grease fittings, even under pressure.

    Buy the Original
    Best Selling Coupler

    Sold out

    Buy the XL
    For Recessed Fittings

    Sold out

    WITH FREE SHIPPING &
    100% SATISFACTION GUARANTEED

    END GREASING FRUSTRATION

    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. You do not need to "crack" the coupler off to the side to release, simply press the thumb lever and it easily releases.

    The LockNLube® Grease Coupler is fully rebuildable. If it ever shows signs of leaking, 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.

    DOWNLOADS

    LockNLube Grease Coupler Spec Sheet
    Milwaukee Grease Gun Owners - Please see this warning 
    Illustrated Seal Kit Replacement Instructions

    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.

    THE ORIGINAL LOCKING GREASE COUPLER

    1. Improved sliding sleeve releases easily under pressure.

    2. Thicker steel jaws resist bending

    3. New rubber seal lasts twice as long

    1. Unique sliding sleeve releases easily under pressure.

    2. Thick steel jaws resist bending.

    3. Rubber seals lasts twice as long as others.

    QUICK AND EASY TO USE

    Spring Loaded Activation Trigger

    ● Simply depresses the trigger when locking the coupler onto the Zerk or to release the coupler when done.

    ● Easy to clip-off, regardless of pressure build up in the line. NO MORE stuck couplers.

    ● No need to hold while greasing. Lock-on and free up both hands to operate your grease gun.

    Sliding Sleeve

    ● Locks the coupler onto the Zerk. When you pump grease...it stays on!

    1/8" NPT Female Thread

    ● Standard size, fits all grease guns.

    Four Hardened Spring Steel Jaws

    ● Rated over 10,000 PSI. Will not bend or release under pressure. Fits all Zerk fittings.

    Leak Free, High Pressure Seal

    ● Patented design eliminates leaks and extends seal life.

    WORKS WITH ALL GREASE GUNS TYPES

    Works with all grease gun types:

    ● Pneumatic

    ● Manual

    ● Electric

    Works with all grease gun manufacturers:

    ● Lincoln

    ● Lumax

    ● Alemite

    ● Plews lubrication (Edelmann)

    ● Grainger

    ● SKF

    ● Macnaught

    ● ADT

    ● Milwaukee

    ● John Deere

    ● Wilmar

    ● Legacy

    ● Allstar

    ● Sealey

    ● Draper

    ● DeWalt

    ● And many others

    Will not pop off or leak under pressure

    The LockNLube Grease Coupler is rated to 10,000 PSI (690 Bar) and will not release under pressure. No hands are needed to align the coupler or keep it attached. No leaking grease, and no problem using both hands to pump your grease gun, or move around the machine. Eliminate frustration from machine maintenance by using the only grease coupler that is guaranteed not to leak and not to pop off under pressure.

    UPGRADE YOUR GREASE COUPLER

    The LockNLube® Grease Coupler will work to its full potential, even at extreme angles. Once it is locked on you have the peace of mind that it will not pop off, will not leak, and grease is going into the bearings that need it, and not onto your machine. Stop fighting with old greasing equipment that can’t be trusted and upgrade to the grease coupler that almost makes greasing fun.

    LOCKNLUBE VS. THE OTHER GUYS

    Feature LockNLube® Grease Coupler Competitors & Knock Offs

    Rated to Handle up to 10,000 PSI

    YES

    NO

    Unique Patented Design Locks On & Won't Leak

    YES

    NO

    Rebuildable for Years of Use

    YES

    NO

    Sold from the LockNLube's New Hampshire, USA HQ

    YES

    NO

    Satisfaction Guaranteed By LockNLube®

    YES

    NO

    KEY SPECIFICATIONS

    Max Pressure

    10,000 psi (390 Bar)

    Zerk Compatibility

    Fits all DIN and SAE specification Zerks (grease nipples).

    Coupler Thread

    1/8" 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)

    3/5 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

    "Best investment I've made, makes maintenance a lot easier when you don't have to strain, twist and stretch to hold the coupler on the fitting!"

    Grady H.

    "I will say this makes using a grease gun very easy!! Anyone that has used grease guns with the press on fitting knows how aggravating it can be to get off the grease fitting. This addition is very easy to install and use. Everyone with a grease gun needs one!!!"

    Timothy W.

    "Excellent. All the years struggling with difficult grease zerts and now the grease goes in the fitting not all over the machine. Awesome solution to get grease to go in the fitting."

    Mark A.

    RELATED ITEMS

    LockNLube® Grease Coupler XL

    $39.95

    LockNLube Universal Rebuild Kit

    $7.85

    RELATED ITEMS

    LockNLube® Grease Coupler XL

    $39.95

    LockNLube® Universal Rebuild Kit

    $7.85

    Total Satisfaction Guarantee
    Total Satisfaction Guarantee

    We are so confident that you'll love your LockNLube® products that you have 30 days to try them out risk-free. If you aren't completely satisfied, return them for a full refund. No strings attached.

    1-Year Warranty
    1-Year Warranty

    All of our products are guaranteed for one year from the time of purchase against manufacturing defects. If you product malfunctions or breaks, let us know if you'd like a refund or a replacement. We'll make it right.

    LOCKNLUBE PRODUCTS INCLUDE A FULL GUARANTEE AND A DEDICATED SUPPORT TEAM.

    We offer a lifetime guarantee on the manufacturing of our products and are available to answer any questions you have from our office in New Hampshire. Give us a call at 603-795-2298.