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.
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This item is eligible for return within 30 days of receipt
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.
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Availability:
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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
Item Weight: 4 ounces
Product Dimensions: 3.45 x 0.63 x 1.66 inches
Country of Origin: South Africa
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:
within 30 days
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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Top Amazon Reviews
Size: NPT +Spare Rebuild Kit
This product lives up to the hype. I used it for the first time today on a 2021 Chevy 3500 Express Van. I had absolutely no issues greasing all 11 zerk fittings. The one thing you need to watch for is over lubing the joints. I noticed it put out more grease then the stock bit on my basic grease gun. Buy it now.
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Reviewed in the United States on June 18, 2025 by Michael Spawn
Size: NPT +Spare Rebuild Kit
I was ready to give up and could not figure out why the grease wouldn't go into the fitting. I bought two grease guns and neither worked. My last hope was buying this thing and it was kinda pricey but not more than any alternative and it worked perfect right away.. this thing is awesome
Reviewed in the United States on June 20, 2025 by Tyler DeAngelo
Size: NPT +Spare Rebuild Kit
This the go-to coupler when I'm greasing the points. it's on the large side, so it does not fit all the points I need to hit, but I always use it to do what it can do and then switch it out with a smaller straight coupler to get the difficult ones.
Reviewed in the United States on June 22, 2025 by RiverDr
Size: NPT +Spare Rebuild Kit
Used it today and I was kicking myself for not buying this awesome, locking tool sooner! Stays on the grease fitting until your done. You're able to use both hands to pump your grease gun & focus on the bearing for the new grease squirting out. So much easier!
Reviewed in the United States on June 22, 2025 by David Puerner
Size: NPT +Spare Rebuild Kit
Works good just doesn’t fit in tight spots , but good product!
Reviewed in the United States on June 15, 2025 by D. Smith
Size: NPT +Spare Rebuild Kit
Gone are all of my grease fitting troubles. It simply does what it’s supposed to do. All of the grease goes into the zerk fitting and nothing leaks out. Well worth the price.
Reviewed in the United States on June 22, 2025 by Elliot Schrock
Size: NPT +Spare Rebuild Kit
I bought this to replace the wonky coupler on a Performance Tool grease gun I bought new recently. This item installed easily, and seems to be well made. Now, if you have heavy equipment, or farm equipment, I can see where this would be a major time and aggravation saver. For automotive stuff I would urge caution. It simply will not lock on to the zerks on my u-joints on a 2002 Ford F-150. The coupler is too fat. I will have to remove one of the 12mm bolts on the yoke to be able to lock this on. In other words if your zerk is a straight shot this will work, in a tight spot its width (and longer length than an ordinary coupler) will work against you. I gave it five stars because on ball joints, and tie rod ends its the bomb! For that alone its worth it to me. Some things under a truck are difficult to hold a ordinary coupler and pump the grease gun at the same time, thats where this product shines.
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Reviewed in the United States on April 19, 2025 by Bubba J
Size: NPT +Spare Rebuild Kit
Where has this been all my life? Excellent fitting. All grease guns should come with this or similar fitting. It simply works. I thought I was doing something wrong all the years of my life. I could never get grease INSIDE the zerts fittings, always all around the outside. This is worth the expense, take my word for it and thank me later.
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Reviewed in the United States on May 28, 2025 by B. Hulsey