---
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: "$120"
currency: NZD
in_stock: true
reviews_count: 6
category: "Lock N Lube"
url: https://www.desertcart.nz/products/266903180-grease-gun-coupler-locks-onto-zerk-fittings-grease-goes-in
store_origin: NZ
region: New Zealand
---

# Rated up to 10,000 PSI pressure Locks securely on Zerk fittings Rebuildable with spare seal kit included 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:** $120
**Availability:** ✅ In Stock

## Summary

> 🔧 Lock it, grease it, forget the mess—maintenance made effortless!

## 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?** $120 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/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

- • **Universal Compatibility:** Fits all 1/8" NPT grease guns—manual, pneumatic, or battery-powered—upgrade any setup instantly.
- • **Maximize Machine Longevity:** Eliminate grease waste and mess, ensuring your equipment gets precise lubrication exactly when it needs it.
- • **Lock & Load with Confidence:** Patented locking mechanism ensures a leak-proof, hands-free grease application every time.
- • **Built to Last, Rebuilt to Save:** Includes a spare rebuild kit—double the value, double the uptime for your maintenance routine.
- • **Effortless Release Under Pressure:** Thumb lever design lets you detach easily even from pressurized or recessed Zerk fittings—no more stuck couplers.

## Overview

The LockNLube Grease Gun Coupler is the world’s best-selling original locking grease coupler, engineered to lock securely onto all SAE and metric Zerk fittings. Rated for up to 10,000 PSI, it features a patented sliding sleeve locking mechanism that prevents leaks and mess, freeing both hands for efficient greasing. Compatible with all 1/8" NPT grease guns—manual, pneumatic, or battery-powered—and rebuildable with an included spare seal kit, it’s designed for long-lasting, hassle-free maintenance.

## Description

Just imagine if greasing your machine could be easier. Less painful and less frustrating. That's what you get with the Lock and Lube grease coupler. With its patented sliding sleeve locking mechanism, the coupler locks on and creates a leak-proof seal. The waste and the mess are gone! If a fitting becomes pressurized, especially a recessed one, just depress the thumb lever and release the coupler. No more fighting and struggling with stuck-on couplers. No more broken-off fittings. For those of you who prefer lever guns, once the Lock and Lube coupler is locked on, both hands are free to pump the grease. With an 1/8" NPT connection, works with all standard grease guns: electric, pneumatic or hand-operated. When frustration and aggravation END, so does greasing procrastination! Your machines will get the grease they so desperately need when they need it. The Lock and Lube grease coupler WILL CHANGE your life! Now available standard with a replaceable Seal Kit (extra seal + 4 hardened steel jaws). With this extra seal, the LockNLube coupler achieves multi-year service life. A spare Seal Kit is included with each coupler - so when the existing durable nitrile rubber seal reaches it's service life or is damaged by a burred zerk, you simply change out the seal. Additional Seal Kits are also available.

Review: Recommended - The best lube piece you need to have. Good quality and recommend to buy.
Review: 非常に良い製品です。

## 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 | #23,289 in Automotive ( See Top 100 in Automotive ) #41 in Automotive Fuel Transfer & Lubrication |
| Brand | LockNLube |
| Customer Reviews | 4.7 4.7 out of 5 stars (30,478) |
| Date First Available | 26 September 2014 |
| Exterior | Uncoated Metal |
| Item Weight | 113 g |
| Item model number | 1/8\\\" NPT |
| 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 type:** National Pipe Tapered
- **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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Recommended
*by A***D on 4 August 2021*

The best lube piece you need to have. Good quality and recommend to buy.

### ⭐⭐⭐⭐⭐ Review
*by 村***夫 on 11 March 2022*

非常に良い製品です。

### ⭐⭐⭐⭐⭐ Review
*by S***E on 11 November 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

## 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 New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-19*