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- – No impact on credit to apply
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Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
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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.
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Availability:
In Stock.
Arrives
Thursday, Oct 29
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At a glance
- Condition
- New
- Size
- NPT With Spare Rebuild Kit
- Model
- 1/8\\\" NPT
- Dimensions
- 3.45 x 0.63 x 1.66 in
- Weight
- 4 oz
- Color
- Silver
- Material
- Steel, Rubber
- In the box
- Just the item
- Warranty
- 1-Year Warranty
Features 5
- LOCKS ON, STAYS ON: Secure lock on grease coupler lets you grease machinery with both hands free. No leaks or mess, making maintenance faster and easier for every job.
- REBUILDABLE DESIGN INCLUDED: Comes with a spare rebuild kit for long-lasting use. Get the best lock on grease coupler value with easy maintenance and reliable performance.
- UNIVERSAL GREASE GUN FIT: Compatible with all grease gunsmanual, battery, or pneumatic. The 1/8 in NPT threaded connection fits most grease gun coupler lock setups.
- FITS ALL ZERK FITTINGS: Works with SAE and metric Zerk fittings. Quick lock grease gun coupler design reaches tight spots and adapts to any machine for versatile use.
- EASY RELEASE UNDER PRESSURE: Patented thumb lever opens jaws for fast attachment and removal. Rated up to 10,000 psi for heavy-duty jobs. Covered by a 1-year warranty.
Description
Easily disconnects, even under pressure. No more broken Zerks. 1/8" NPT compatible with all grease guns - battery, pneumatic, manual. The only fully rebuildable grease coupler, available with or without a rebuild kit, extending service life and reducing replacement costs. Patented Locking Technology (US Patent #8955544) means grease goes in, not on, the machine! The LockNLube Grease Couler XL (GC81042) has a 2" longer barrel for those deeply recessed fittings!
Specs 10
| Manufacturer | LockNLube |
|---|---|
| Part Number | GC81011 |
| Item Weight | 4 ounces |
| Product Dimensions | 3.45 x 0.63 x 1.66 inches |
| Item model number | 1/8\\\" NPT |
| Size | NPT With Spare Rebuild Kit |
| Color | Silver |
| Material | Steel, Rubber |
| Item Package Quantity | 1 |
| Maximum Pressure | 10000 psi |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Oct 29
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 Google Pay
Learn more about financing & leasing here.
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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.
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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.
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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