---
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: "₩99611"
currency: KRW
in_stock: true
reviews_count: 8
category: "Lock N Lube"
url: https://www.desertcart.kr/products/3992963-locknlube-grease-gun-coupler-locks-onto-zerk-fittings-grease-goes
store_origin: KR
region: South Korea
---

# Rated up to 10,000 PSI pressure Locks securely on Zerk fittings Rebuildable with included spare kit 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:** ₩99611
**Availability:** ✅ In Stock

## Summary

> 🔧 Lock it tight, grease it right—never miss a beat on maintenance!

## 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?** ₩99611 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/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:** Comes with a spare rebuild kit—extend the life of your tool and save money in the long run.
- • **Effortless Operation:** One-thumb lever control for quick attach and release, even under pressure—greasing made smooth and hands-free.
- • **Universal Compatibility:** Fits all 1/8" NPT grease guns and works seamlessly with SAE & Metric Zerk fittings—upgrade any setup instantly.
- • **Lock & Load with Confidence:** Patented locking jaws keep the coupler firmly attached—no slips, no leaks, no wasted grease.
- • **Powerhouse Pressure Performance:** Handles up to 10,000 PSI, making it the toughest partner for any grease gun, manual or powered.

## Overview

The LockNLube Grease Gun Coupler is the world’s best-selling original locking coupler designed to securely attach to all Zerk fittings. Rated for up to 10,000 PSI, it ensures grease goes exactly where it should—no leaks, no mess. Its patented locking mechanism frees your hands for efficient operation, while the included rebuild kit guarantees long-lasting durability. Compatible with all 1/8" NPT grease guns, this steel and rubber tool is a must-have for professionals demanding reliability and precision in lubrication.

## 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: 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
Review: Doesn’t slip off - Works great, little big for tight spaces, good quality

## 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 | #580 in Automotive ( See Top 100 in Automotive ) #3 in Fuel Transfer & Lubrication Products |
| Brand | LockNLube |
| Brand Name | LockNLube |
| Customer Reviews | 4.7 out of 5 stars 31,818 Reviews |
| Global Trade Identification Number | 00810102950260 |
| Included Components | Just the item |
| Item Dimensions | 3.45 x 0.63 x 1.66 inches |
| Item Height | 1.66 inches |
| Item Weight | 0.25 Pounds |
| Item dimensions L x W x H | 3.45 x 0.63 x 1.66 inches |
| Manufacturer | LockNLube |
| Manufacturer Warranty Description | 1-Year Warranty |
| Material | Steel, Rubber |
| Material Type | Steel, Rubber |
| Maximum Operating Pressure | 10000 Pound per Square Inch |
| Maximum Pressure | 10000 Pound per Square Inch |
| Model Number | 1/8\\\" NPT |
| Number of Ports | 2 |
| UPC | 810102950260 |
| Valve Type | Plug Valve |

## 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

### ⭐⭐⭐⭐⭐ 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

### ⭐⭐⭐⭐⭐ Doesn’t slip off
*by A***R on December 28, 2025*

Works great, little big for tight spaces, good quality

### ⭐⭐⭐⭐⭐ Great upgrade for a M18 grease gun
*by D***O on January 8, 2026*

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.

## 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 South Korea*
*Store origin: KR*
*Last updated: 2026-01-26*