---
product_id: 3992963
title: "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."
brand: "locknlube"
price: "€ 70.94"
currency: EUR
in_stock: true
reviews_count: 13
category: "Lock N Lube"
url: https://www.desertcart.sk/products/3992963-locknlube-grease-gun-coupler-locks-onto-zerk-fittings-grease-goes
store_origin: SK
region: Slovakia
---

# Rated up to 10,000 PSI pressure Locks securely on Zerk fittings Rebuildable with spare kit included 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.

**Brand:** locknlube
**Price:** € 70.94
**Availability:** ✅ In Stock

## Summary

> 🔧 Lock it tight, grease it right — the pro’s secret weapon!

## Quick Answers

- **What is this?** 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. by locknlube
- **How much does it cost?** € 70.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/3992963-locknlube-grease-gun-coupler-locks-onto-zerk-fittings-grease-goes)

## Best For

- locknlube enthusiasts

## Why This Product

- Trusted locknlube brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Double Your Value:** Includes a spare rebuild kit—like getting two couplers in one purchase.
- • **Effortless Operation:** Patented thumb lever design for quick, leak-free attachment and release.
- • **Universal Compatibility:** Fits all 1/8" NPT grease guns—manual, pneumatic, or battery-powered.
- • **Pressure-Proof Performance:** Handles up to 10,000 PSI, ensuring durability under the toughest conditions.
- • **Lock & Load with Confidence:** Securely locks onto all SAE & Metric Zerk fittings for mess-free greasing.

## Overview

The LockNLube Grease Gun Coupler is the world’s best-selling original locking coupler, engineered to securely attach to all Zerk fittings and rated for up to 10,000 PSI. Its rebuildable design includes a spare kit, offering unmatched longevity and value. Compatible with all 1/8" NPT grease guns, it ensures clean, efficient lubrication with a patented thumb lever for easy, leak-free use. Trusted by professionals for over a decade, it’s the ultimate upgrade for maintenance pros seeking precision and reliability.

## Description

Buy 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.: Grease Guns - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Secure, Clean, and Worth It - This grease coupler works extremely well. It provides a very secure, tight hold on grease zerk fittings, which allows for better grease transfer and significantly less mess compared to standard couplers. The spring in the coupler feels strong and well-built, giving you confidence that it won’t pop off under pressure. It is slightly longer and a bit bulkier than the original couplers that come on most grease guns (both electric and manual), but that actually works in its favor. In tight spots where you can’t wiggle or twist the coupler to disconnect it, this one saves a lot of frustration. No more yanking on the hose or fighting to get it off the fitting. When I bought this coupler, I also picked up the LockNLube 8-Piece Quick Connect Greasing Accessory Kit, knowing clearance might be an issue in some areas—and I don’t regret that decision at all. The combination works great and makes greasing much easier overall. I’m very satisfied with this purchase and would absolutely recommend this grease coupler to anyone who does regular maintenance and wants a cleaner, easier experience.
Review: Great product That doesn't disappoint! - 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

## Features

- LOCKS ON, STAYS ON, WON'T LEAK—LIKE 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 Grandpa’s 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 LockNLube’s 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00H7LPKKU |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #369 in Automotive ( See Top 100 in Automotive ) #4 in Fuel Transfer & Lubrication Products |
| Brand | LockNLube |
| Customer Reviews | 4.7 4.7 out of 5 stars (31,905) |
| Date First Available | December 9, 2013 |
| Global Trade Identification Number | 00810102950260 |
| Included Components | Just the item |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 4 ounces |
| Item dimensions L x W x H | 3.45 x 0.63 x 1.66 inches |
| Item model number | 1/8\\\" NPT |
| Manufacturer | LockNLube |
| Material | Steel, Rubber |
| Maximum Operating Pressure | 10000 Pound per Square Inch |
| Number of Ports | 2 |
| Part Number | GC81011 |
| Product Dimensions | 3.45 x 0.63 x 1.66 inches |
| Size | NPT With Spare Rebuild Kit |
| UPC | 810102950260 |
| Warranty Description | 1-Year Warranty |

## Product Details

- **Brand:** LockNLube
- **Global Trade Identification Number:** 00810102950260
- **Item dimensions L x W x H:** 3.45 x 0.63 x 1.66 inches
- **Manufacturer:** LockNLube
- **Material:** Steel, Rubber
- **Maximum Operating Pressure:** 10000 Pound per Square Inch
- **Number of Ports:** 2
- **UPC:** 810102950260

## Images

![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. - Image 1](https://m.media-amazon.com/images/I/71AOumYncbL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Does this work with Milwaukee grease guns?**
A: This does not work on the older Milwaukee m18 grease guns. They used a metric threaded hose on the older ones. The newer guns have standard thread and it will fit those. Take the current connector off the end of your grease gun hose. If the first 1/8 inch of the hose is not threaded, then you have a metric hose and this lock lune will not fit.

**Q: Where is this product manufactured?**
A: It is a quality product made in South Africa by Gurtech.

**Q: After installing it, I couldn't depress the gun's pump. What did I do wrong?**
A: Between myself and friends we have successfully installed five of these fittings without any problems. As per the other reviews, I would first check your gun to see if was in fact pumping grease, then reinstall the coupler and try again, before you put it on a fitting. Could be that the fitting jerk that you tried it on was frozen. If it still does not allow grease to flow, it is defective and you will need to return it.

**Q: It is just the fitting or does it include the flexible line?**
A: It is just the fitting. The hose was included to give context and sense of scale.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Secure, Clean, and Worth It
*by N***H on February 21, 2026*

This grease coupler works extremely well. It provides a very secure, tight hold on grease zerk fittings, which allows for better grease transfer and significantly less mess compared to standard couplers. The spring in the coupler feels strong and well-built, giving you confidence that it won’t pop off under pressure. It is slightly longer and a bit bulkier than the original couplers that come on most grease guns (both electric and manual), but that actually works in its favor. In tight spots where you can’t wiggle or twist the coupler to disconnect it, this one saves a lot of frustration. No more yanking on the hose or fighting to get it off the fitting. When I bought this coupler, I also picked up the LockNLube 8-Piece Quick Connect Greasing Accessory Kit, knowing clearance might be an issue in some areas—and I don’t regret that decision at all. The combination works great and makes greasing much easier overall. I’m very satisfied with this purchase and would absolutely recommend this grease coupler to anyone who does regular maintenance and wants a cleaner, easier experience.

### ⭐⭐⭐⭐⭐ Great product That doesn't disappoint!
*by S***E on November 11, 2025*

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

### ⭐⭐⭐⭐⭐ LockNLube Grease Coupler
*by S***R on February 4, 2026*

The coupler fit on my existing grease gun and worked as advertised. Great product! Bo more struggling to get it on and off grease fittings.

## Frequently Bought Together

- 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.
- LockNLube 90 Degree Grease Coupler Adapter
- LockNLube Pressure Return Valve for Use with Cordless Grease Guns. No More Pressure Locks! Returns Grease to The Tube. Releases Hose backpressure.

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-10*