LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable tool.
Condition: New
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Sunday, Aug 31
Size: NPT With Spare Rebuild Kit
Features
- LOCKS ON, STAYS ON, WON'T LEAKLIKE HAVING AN EXTRA HAND! No need to hold the coupler in place while trying to grease your machinery. The LockNLube Grease Coupler locks on tight and lets you use both hands on your grease gun.
- THE ONLY REBUILDABLE LOCKING COUPLER: We include a spare rebuild kit! It's like getting two couplers for the price of one.
- 1/8" NPT COMPATIBLE WITH ALL GREASE GUNS - BATTERY, PNEUMATIC, MANUAL: Whether you are using Grandpas old Alemite lever grease gun, or the latest battery or pneumatic grease guns, the LockNLube Grease Coupler can be added to upgrade your grease gun.
- WORKS ON ALL ZERK FITTINGS, SAE & METRIC with a full lineup of adapters to reach any grease fighting on any machine!
- EASY TO USE: Press the thumb lever to open the LockNLubes patented jaws and attach to the Zerk. Release the thumb lever and the LockNLube locks on tight! Press the thumb lever again to easily release from the Zerk, even under pressure!
- RATED UP TO 10,000 PSI
- BEST BUILT GUARANTEE: The LockNLube Grease Coupler is covered by our unconditional 1-year warranty
Manufacturer: LockNLube
Brand: LockNLube
Model: LockNLube Grease Coupler
Item Weight: 4 ounces
Product Dimensions: 3.45 x 0.63 x 1.66 inches
Item model number: 1/8\\\" NPT
Is Discontinued By Manufacturer: No
Manufacturer Part Number: GC81011
Date First Available: December 9, 2013
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Aug 31
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Size: NPT With Spare Rebuild Kit
This is what all good grease guns should come with. Works flawlessly a it should. No wasted grease because the coupler comes off. Even stalling the grease gun on a blocked fitting still allows for easy removal. Top of the line product.
Reviewed in the United States on May 24, 2025 by Bry
Size: NPT With Spare Rebuild Kit
Awesome product, safest in the industry! Works as described! Must buy!
Reviewed in the United States on August 1, 2025 by WWTKVR
Size: NPT With Spare Rebuild Kit
I balked at the price at first. It's half the price of grease gun, but it works. I have arthritis in my hands and trying to pump grease with one hand and holding the barrel on the zerk fitting didn't work. Screw on/off, bayonet types, tried them all, but this one performs as advertised. Squeeze the lever and push it on the grease fitting and it holds tight without any help from me. I can use both hands to pump grease. And it is fast. I did a whole bucket loader with backhoe in 15 minutes. It is small enough to fit into tight places on itty bitty Japanese tractors. I'm so happy, I'm going to grease the drive train on my Jeep right now just because I can.
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Reviewed in the United States on July 27, 2025 by Douglas A. Widerholt
Size: NPT No Spare Rebuild KIt
WOW! This Lock Nut tool really works! I used it on my Haulmark trailer hubs because my old grease tip wouldn't fit on the zerk fitting. The tool locked on the fitting tightly and made my job a lot easier. Very happy with it.
Reviewed in the United States on July 16, 2025 by Ed Baranowski -. Woodworking
Size: NPT With Spare Rebuild Kit
Worked excellent on auto grease fittings but on my boat fittings it couldn't seal and get grease in. Maybe the boat zerks are too old but grease didn't go in just went all over the outside but overall seems to be a very nice piece.
Reviewed in the United States on April 22, 2025 by Johnny
Size: NPT With Spare Rebuild Kit
Made it easy to keep the Bearing Buddies on my boat trailer packed with grease. Easy to use, no leaks! Well-made quality product, fits perfectly.
Reviewed in the United States on August 14, 2025 by Craig
Size: NPT With Spare Rebuild Kit
Works perfect
Reviewed in the United States on August 7, 2025 by Stu
Size: NPT With Spare Rebuild Kit
I’ve struggled for years with various grease guns and all seemed like garbage until I bought this a week ago. Where has this been my whole life?? I’ve only used it a few times but it worked absolutely flawlessly. Time will tell how it hold up but this made pushing grease a breeze. And I used the same ol grease gun that I was about to toss.
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Reviewed in the United States on August 14, 2025 by Scott S.