6 Best Grease Gun Coupler of 2022 -Reviews | Top picks & Buying Guide

Grease guns are a standard tool used in everyday tasks. They are usually required for automotive greasing and lubrication. But let’s admit it, greasing is not the most fun job. However, it is necessary to keep your equipment running smoothly for maximum efficiency. So, if you are a DIYer or professional working in factories, grease gun couplers are what you need.

You need one that will help keep grease inside the coupler not to have to clean up a mess every time. You can also be more precise in the application. This way, you will also avoid leaving too much grease on the machines, which could attract dust and dirt from outside and cause problems when using it on other tools.

Grease gun couplers are sold in many shapes and sizes. So in this article, we’re going to address and review the best grease gun coupler that you might be able to use and consider around your workplace.

🏅 Our Top Picks

1. Editor’s ChoiceLockNLube Grease Gun Coupler-GC81011 

“Weighs 4.2 ounces, easy to install and use, get free replacement parts, handles up to 10,000 psi pressure, locks on-stays on.”

2.  Premium PickLumax LX-1403 Silver Heavy-Duty Quick-Release Grease Coupler 

“Great for heavy-duty applications as it withstands up to 15,000 psi pressure, the Non-Return Valve eliminates residue buildup, great design including thumb lever and durable seal.” 

3. Upgraded DesignMacnaught KY PLUS-02 Plus Safety Grease Coupler 

“Ergonomic design with unique floating jaws and compact barrel diameter, two-year warranty, locks on and stays on, ensures a clean workspace.” 

4. Best for BeginnersLincoln Lubrication 5883 Slotted Right Angle 90 Degree Coupler 

“Suitable for low-duty applications, weighs only 0.32 ounces, withstands pressure up to 1,000 psi, has a Right Angle Design for better reach, leak, and spill-free application.” 

6. Best Value– DEWALT Grease Gun Coupler-DCGG5701 

“Economically priced, tolerates up to 10,000 psi pressure, 30-day money-back guarantee, durable and compatible with ⅛” NPT Fittings.”

List Of Top 6 grease gun couplers in 2022

To help you pick your best grease gun coupler, we’ve compiled a list of the top grease gun coupler, including our top picks from popular brands including LockNLube, Dewalt, Macnaught, Lumax and more.

LockNLube Grease Gun Coupler9/10

LockNLube Grease Gun CouplerEditor’s Choice

  • Fits all Grease Guns – 1/8” NPT fitting.
  • Locks on, does not leak.
  • Patented Locking Technology.
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DEWALT Grease Gun Coupler

DEWALT Grease Gun CouplerBest Value

  • Heavy Duty replacement piece
  • Max operating pressure up to 10, 000 psi
  • It comes with a 30 day money back guarantee
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Macnaught Safety Grease Coupler

Macnaught Safety Grease CouplerUpgraded Design

  • Compact Barrel Diameter
  • True One-Handed Design – Easy to Use.
  • It comes with Two year warranty!
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LockNLube Grease Gun Coupler XL

LockNLube Grease Gun Coupler XLUser Friendly

  • Rated to 10,000 PSI
  • Does not leak once locked on
  • Fits all standard Grease Guns
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Lincoln Lubrication 90° Coupler

Lincoln Lubrication 90° CouplerBest for Beginners

  • Easy to Use.
  • Compatible with all Grease Guns
  • Does not leak
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Lumax  Heavy-Duty Quick-Release Grease Coupler

Lumax Heavy-Duty Quick-Release Grease Coupler Premium Pick

  • Max operating pressure up to 15, 000 psi
  • Integrated 1/8″ NPT Connection
  • Suitable for All type of Grease Guns
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Best Grease Gun Coupler Review

Today, there are many options available in the market. So, it’s challenging to make the decision. So, we helped you narrow down the field by choosing the best grease gun couplers that we came across. We’ve included all the required details, features, advantages, and shortcomings- so you can efficiently choose your greasing companion!

1. LockNLube Grease Gun Coupler-GC81011

best grease gun coupler

The LOCKNLUBE coupler is the easiest solution to prevent grease gun leaks. There are no parts to lose. It’s designed for all ⅛” NPT grease guns, locking on after every shot of grease. This patented design locks on and stays on, and with over 10,000 psi under high pressure, you can be confident that it will not leak or fail. 

It is designed to make greasing more enjoyable and less of a hassle. Just insert the end of the LockNLube coupler into your grease gun, and then secure it with the steel jaws. 

They hold the coupler tight onto the Zerk fitting, making it easy to scramble a coupling on and off quickly. The LockNLube coupler will then keep your grease gun securely at an angle so you can take the pressure off of your hands and enjoy greasing up.

This grease coupler is designed to replace the standard coupler on grease guns. It solves various problems associated with fitting mechanics such as grease leakage, insufficient lubrication, wear and tear, rust and corrosion issues, and can even release fittings that have become stuck. In addition, it is simple to install and simple to use for no-hassle greasing.

If the tool is used for an extended period, there is a possibility that the jaw or seal gets worn out. In this case, you can ask for it to be replaced with a new spare part, completely free of cost.

Top Pick

4.8 out of 5 Stars

LockNLube Grease Gun Coupler

Key Features

  • Versatile and compatible with all ⅛” grease guns
  • Can take maximum pressure of 10,000 psi
  • Weighs 4.2 ounces


  • Simple to install and leaves both hands free
  • Free Replacement Parts
  • No leaks and mess-free


  • Will not work in areas with limited clearance due to slightly wider fitting.

2. DEWALT Grease Gun Coupler-DCGG5701

best dewalt Grease Gun Coupler

When you need to apply grease to the shaft of a drill or impact driver, this DEWALT coupler makes it easier to reach tight spots, designed to work with ⅛ inch NPT grease fittings commonly found on machinery. Its expected usage is in agriculture and farming equipment, compressors, trailers, and utility vehicles like lawnmowers.

The DEWALT Grease Gun Coupler is a heavy-duty grease gun coupler. Not only does it fit perfectly into grease guns, but it also quickly attaches and releases from the gun. It’s built to withstand the high operating pressures of up to 10,000 psi of all cordless grease guns. Plus, this Grease Gun Coupler is made with a composite body for comfortable handling pin joints resistant to wear and rust. 

The coupler utilizes the pressure of the grease gun to lock the lines together, preventing coupler separation hydraulically. This system allows the grease to push against both the coupler and tube, creating a seal that requires extreme pressure before any leakage will occur. However, you do get what you pay for, so you may face a problem with leaking.

We know how hard it is to tear yourself away from a project, so this affordable DEWALT model allows you to finish your work without breaking your momentum. Plus, it is designed with a perfect 3-Pack to meet all your needs. This company is confident in the model’s design, which is why this set of couplers has a money-back guarantee of 30 days, in case you do not like it or get any defect. However, you probably won’t need it!

Best Value

4.6 out of 5 Stars

DEWALT Grease Gun Coupler

Key Features

  • Designed to work with ⅛ inch NPT grease fittings 
  • Withstands high operating pressure of 10,000 psi
  • Weight: 5.6 ounces


  • 30-day Money-back guarantee
  • 3-pack convenience 
  • Economically priced


  • Leaking and fitting correctly might become a problem.

3. Macnaught KY PLUS Grease Coupler

Macnaught Grease Coupler

The MacNaught Safety Grease Coupler is a quick and easy way to dispense grease. Built with an ergonomic design to easily fit in your hand, the Safety Coupler keeps your hands clean and away from the grease. Additionally, its simple design provides a strong, leak-free connection that’s easy to use.

Easy-to-use and safer than conventional systems, Macnaught’s KY Plus grease gun is designed to make your chassis work less cumbersome and error-free. A new release mechanism that makes it easier and safer for you to release the grease gun from the coupler and compact barrel diameter (smallest in the market) fits already available products. In addition, the specialized shape ensures that there are no mistakes in the operation of greasing.

The KY+ was designed with convenience and trouble-free operation in mind. Its unique floating jaw design makes it easy to connect or change couplers without tools. The KY+ couples fast and give the operator confidence that a leak will not ensue if it is accidentally bumped during coupling. No leaks, no mess-makes for easy cleanup while providing a long life between field service calls. 

This Grease Gun coupler has a unique design that provides the user with the ease of single-handed adjustment and locks on tight for a secure fit. Furthermore, the MacNaught KY-Plus uses an internal pressure relief mechanism that reduces the risk of damage due to high-pressure grease release up to 10,000 PSI. 

Top Design

4.1 out of 5 Stars

Macnaught KY PLUS Grease Coupler

Key Features

  • Unique floating jaw design
  • Weight: 3.8 ounces
  • Two-year Warranty


  • Compact Barrel Diameter
  • Internal pressure relief and release mechanism provide a leak-free connection.
  • Allows you to put both hands on the gun 


  • Expensive

4. LockNLube Grease Gun Coupler XL-GC81032

LockNLube Grease Gun Coupler XL

Standard couplers are designed to be hand tightened. You have to stop and grab a tool to tighten it more in the middle of greasing fittings. However, this new power coupler is rated at 10,000 PSI and will not leak once locked onto a fitting. It is hands-free! You can easily lock it on and release it with one thumb. 

The LockNLube Grease Gun Coupler XL-GC81032 is a coupler replacement for grease guns. It fits all standard Grease Guns with a ⅛” NPT Fitting. It will easily replace the existing coupler on your grease gun. With this coupler, you will have no problems loading, locking, and lubing your Zerk fitting. Simply pour in the grease and enjoy fast, efficient, and easy greasing. This locking grease Gun Coupler is built to last!

This device is excellent for getting that grease into all those hard-to-reach places on your grease machine. It has over 3.5″ of reach. But, when it comes to applying lubrication to a shielded bearing or fitting, nothing beats the accuracy and ease of the LockNLube system. 

Just try the XL-GC81032, and you’ll agree that it’s the easiest way to apply grease. Connect it to the grease gun and push it onto your machine. The coupler will align itself with the port, so no hands are needed to hold it in place. If properly connected, grease will flow freely from the gun into the coupler and directly into your equipment. No screwing or unscrewing — LockNLube grabs onto your grease gun coupler and locks into place with one squeeze. 

By eliminating the need to align the coupler before every operation manually, this grease gun adapter removes the opportunity for leaks from misalignment and reduces splatter. LockNLube couplers are precision-built to be robust, economical and guaranteed for life. In addition, they provide a positive connection to a grease gun or air! Plus, a thumb lever lets you release the coupler as quickly as you would push in a soap dispenser- even under high pressure of 10,000 psi!

User Friendly

4.7 out of 5 Stars

LockNLube Grease Gun Coupler XL

Key Features

  • Spring-loaded thumb lever for easy release
  • XL size for recessed fittings
  • Includes rebuild kit for seals and jaws.


  • Durable and leak-free working mechanism
  • 3.5-4” of reach- perfect for hard-to-reach areas
  • It withstands pressure up to 10,000 psi, so it stays on 


  • Expensive compared to other LockNLube models

5. Lincoln Lubrication Right Angle 90 Degree Coupler


Lincoln Lubrication 90 Degree Coupler

Featuring a unique design, Lincoln Lubrication’s Model 5883 Special Access 90° Coupler fits all standard 1/8″ NPT grease hoses. In addition, the coupler is angled at 90°, offering the right fit and sway to make it into tight clearance areas. This coupler is Crafted for durability and reliability with a rugged cast pump head, and it will hold up for years to come. Plus, it weighs just 0.32 ounces, making it one of the most lightweight grease gun couplers on the market!

This 90 Degree coupler is a small coupler that doesn’t require the user to tighten anything. It is designed for use in machines that are hard to reach with a bigger coupler. It can also work at angles thanks to built-in grooves on it, which, when pressed against the side of the machine with significant force, locks into place. However, since the coupler doesn’t lock into place right away, if done wrong, it will leak grease into the machine, which is why it requires adding force to get the right angle.

The check valve guides the grease into the right channel and keeps it there, away from air. A hardened plunger and precise bearings resist leaking for longer life. Plus, the right angle design provides greater gun accessibility on vehicles with difficult-to-reach axle lubrication points. Finally, it can work efficiently in the tightest of fittings!

Backed by Lincoln Lubrication’s precision-engineered design, this handy right angle 90-degree coupler is engineered to last. It is built with a high-pressure gas seal, giving you years of hassle-free performance. This grease gun coupler is designed for industrial, commercial, and even home use. And This coupler handles pressures up to 1,000 psi (69 bar) and is built from corrosion-resistant materials for longevity. 

Unique Design

4.4 out of 5 Stars

Lincoln Lubrication Right Angle 90 Degree Coupler

Key Features

  • Weight: 0.32 ounces
  • Operates up to 1,000 psi
  • Accessible check valve for mess-free cleaning


  • Right Angle Design for better reach
  • Crafted for durability and reliability with a rugged cast pump head


  • It takes considerable force to lock-in
  • It will not withstand a considerable amount of pressure.

6. Lumax Heavy-Duty Quick-Release Grease Coupler


Lumax Quick Release Grease Coupler

The LX-1403 grease gun utilizes a quick-release coupler design to enable equipment disassembly easily. This unit is designed to operate from 1,000 PSI to 15,000 PSI with an integrated Non-Return Valve that eliminates harmful residue buildup in the grease hose assembly.

The heavy-duty construction ensures durability and longer life while its quick-release works fast to switch from one gun to another with just the flick of a lever. It also allows a quick, mess-free clean-up. The Lumax LX-1403 securely fits most grease guns and bulk grease pumps. In addition, the ergonomic thumb lever design makes it totally effortless to attach and remove, even when under load. 

Lumax’s LX-1403 grease coupler is a heavy-duty quick-release tool designed to offer tight hold for couplers, lubricating or tightening of joints, and fine control when using grease guns. Plus, the coupler’s heavy-duty seal resists damage for up to thousands of uses, protecting users from having to replace worn-out grease guns constantly.

The Lumax LX-1403 grease coupler is designed for heavy-duty applications in the agricultural, construction, and material handling industry. It offers a 1/8″ NPT connection, gives excellent flow and pressure capabilities, is easy to use, and adapts well. Plus, it prevents leaks and spills so you can work with a clean, uncluttered space!

Premium Pick

4.6 out of 5 Stars

Lumax Heavy-Duty Quick-Release Grease Coupler

Key Features

  • Withstands up to 15,000 psi Working Pressure
  • Integrated ⅛” NPT Connection
  • Non-Return Valve to eliminate residue buildup


  • Heavy-duty seal to prevent constant replacement
  • Prevents leaks and spills for a pristine workspace
  • Ergonomic Thumb Lever for effortless attachment and removal


  • It doesn’t work well with tight fittings

Frequently Asked Questions About Grease Gun Coupler

1. What is a grease gun coupler? 

A grease gun coupler is a small device used for connecting a hand-manipulated grease gun to the fixed hoses and tubes that deliver grease to steer mechanisms on wheel bearing units. The coupler allows the gun to be easily attached or detached from the grease point and provides a solid connection so that the system does not leak.

A coupler translates the mechanical movement of the grease gun trigger lever into hydraulic force in the hose to cause grease to flow. So no matter how much pressure is in the gun, if you pull the trigger and nothing happens or push the trigger and grease shoots out in all directions, it’s plausible because there is a problem with your coupler.

2. How to choose the best grease gun couplers in 2022? 

The initial step in choosing the best grease gun coupler is to decide what coupler you need based on the threads and fittings used in your machinery. The standard ⅛” coupler is your best choice as it will fit all types of grease guns. Plus, a sturdy and durable one is preferable as much force is put on it during operation. 

If you need to pump high-pressure grease, get the coupler working at high pressures. It is better to prioritize quality because low-quality couplers can burst under continuous usage. Other factors such as the style, materials used to make the couplers, the potential for compatibility with other brands, extra features, and any warranty are things you should look into. You need to understand your requirements and specifics of work before deciding on a coupler brand.

3. How do you use a grease gun Coupler? 

The coupler screws onto the end of the grease gun. So, you push down the thumb lever, make sure it fits on top of the zerk fitting, and the jaws are correctly locked. Pull as hard as you can to ensure that it won’t move around. Now, you can be sure that the grease is going into the machine, not on it. When you’re done, just push down the lever again and extract the gun for a quick and easy finish!

Final Verdict About choosing the Best Grease Gun Coupler

Grease couplers are an essential component of a grease gun. A suitable grease coupler will offer you the best of features and durability. It should also be easy to install, remove and store in your workshop or garage. If you are looking for a high-quality grease gun coupler that is affordable, we hope you found this article and the reviews helpful!

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