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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.

  • Based on 31,671 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Mar 25
Order within 22 hours and 31 minutes
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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

Material: Steel, Rubber


Brand: LockNLube


Item dimensions L x W x H: 3.45 x 0.63 x 1.66 inches


Maximum Operating Pressure: 10000 Pound per Square Inch


Number of Ports: 2


Global Trade Identification Number: 60


Manufacturer: LockNLube


UPC:


Material: ‎Steel, Rubber


Brand: ‎LockNLube


Item dimensions L x W x H: ‎3.45 x 0.63 x 1.66 inches


Maximum Operating Pressure: ‎10000 Pound per Square Inch


Number of Ports: ‎2


Global Trade Identification Number: ‎60


Manufacturer: ‎LockNLube


UPC: ‎810102950260


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: Wednesday, Mar 25

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.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Great product That doesn't disappoint!
Size: NPT With Spare Rebuild Kit
Works great... Way better than the original grease coupler... i should have bought one sooner. would have saved me some headache.... i definitely recommend you buy one.... it locks on well. and easy to use.. no leaks. and fits well
Reviewed in the United States on November 11, 2025 by steve

  • Doesn’t slip off
Size: NPT With Spare Rebuild Kit
Works great, little big for tight spaces, good quality
Reviewed in the United States on December 28, 2025 by Amazon Customer

  • Great upgrade for a M18 grease gun
Size: NPT With Spare Rebuild Kit
Using on a Milwaukee M18 grease gun. Works as claimed. Larger diameter tip makes some zerks more difficult to grease due to limited space. However, one handed operation is very nice and worth it.
Reviewed in the United States on January 8, 2026 by Doug Bo

  • No more hands with grease on them.
Size: NPT With Spare Rebuild Kit
Works like a charm!
Reviewed in the United States on January 13, 2026 by Amazon Customer

  • Works good and nice design
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

  • Excellent product - worth the price
Size: NPT With Spare Rebuild Kit
Excellent product. I have a few grease fittings on my boat that are very difficult to see and even harder to reach. A regular grease coupling kept coming off making lubrication impossible. With the LockNLube Grease Coupling I can reach into the small space and lock it on. It stays connected with no grease leaking out. I will not need another grease coupling ever again. Quality product worth the price. ... show more
Reviewed in the United States on January 12, 2026 by Jerbear

  • Exactly what you need!
Size: NPT No Spare Rebuild KIt
I have a Slippery Pete mini grease gun, which is fantastic, but the screw connect head is a pain for anything remotely hidden or hard to reach. I purchased the LockNLube coupler and it is fantastic! So easy to use and seals perfectly. This is a must for ease of use. Quality made product, easy to install on your grease gun or hose, and works as it should. ... show more
Reviewed in the United States on January 14, 2026 by ed

  • Worth the money!
Size: NPT With Spare Rebuild Kit
This thing really works! I highly recommend!
Reviewed in the United States on January 3, 2026 by Jason Breeden

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