---
product_id: 266903180
title: "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: "555.74 DT"
currency: TND
in_stock: true
category: "Lock N Lube"
url: https://www.desertcart.tn/products/266903180-grease-gun-coupler-locks-onto-zerk-fittings-grease-goes-in
store_origin: TN
region: Tunisia
---

# Rated up to 10,000 PSI pressure Locks securely on Zerk fittings Rebuildable with included spare seal kit 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:** 555.74 DT
**Availability:** ✅ In Stock

## Summary

> 🔧 Lock it, grease it, forget it—upgrade your maintenance game!

## Quick Answers

- **What is this?** 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?** 555.74 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/266903180-grease-gun-coupler-locks-onto-zerk-fittings-grease-goes-in)

## 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

- • **Built to Last:** Includes spare rebuild kit for multi-year durability and zero downtime.
- • **Lock & Stay On:** Patented sliding sleeve locks tight—no more juggling grease guns.
- • **Effortless Release:** Thumb lever lets you detach even under pressure—no broken fittings, no frustration.
- • **Mess-Free Greasing:** Leak-proof seal means grease goes in, not on your machine or hands.
- • **Universal Compatibility:** Fits all 1/8" NPT grease guns—manual, pneumatic, or battery-powered.

## Overview

The LockNLube Grease Gun Coupler is the world’s best-selling locking coupler designed to securely attach to all Zerk fittings with a leak-proof seal. Rated for up to 10,000 PSI, it works universally with all 1/8" NPT grease guns—manual, pneumatic, or battery-powered. Featuring a patented locking mechanism and an included spare rebuild kit, it ensures long-lasting, mess-free greasing with effortless attachment and release, backed by a 1-year warranty.

## Description

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. : desertcart.ae: Kitchen

## 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 |
| Best Sellers Rank | #38,816 in Automotive (See Top 100 in Automotive) #62 in Automotive Fuel Transfer & Lubrication |
| Brand | LockNLube |
| Customer Reviews | 4.7 4.7 out of 5 stars (30,786) 4.7 out of 5 stars |
| Date First Available | 26 September 2014 |
| Exterior | Uncoated Metal |
| Item Model Number | 1/8\\\" NPT |
| Item Weight | 113 g |
| Manufacturer | LockNLube |
| Manufacturer Part Number | GC81011 |
| Model | LockNLube Grease Coupler |
| Product Dimensions | 8.76 x 1.6 x 4.22 cm; 113.4 g |

## Product Details

- **Brand:** LockNLube
- **Exterior finish:** Uncoated Metal
- **Inlet connection size:** 5 Millimeters
- **Item dimensions L x W x H:** 8.8 x 1.6 x 4.2 centimeters
- **Material:** Metal

## Images

![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.

## 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 Tunisia*
*Store origin: TN*
*Last updated: 2026-08-30*