Best Grease Gun Coupler for Perfect Greasing! Top 6 Picks for 2023!

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If you’re looking for the best grease gun coupler, you’re at the right place! In this guide, you will learn:

  • What the grease gun couplers are & their purpose
  • Their advantages and disadvantages
  • Various options available at the market
  • How to find the best grease gun coupler for your needs.

So, without further delay, let’s dive into the topic.

Take away key points:

  • Couplers are crucial to keep the lubricating process optimal
  • They come in different sizes, shapes, and types to meet different guns and their connections
  • Check our reviews below to find the best model for your needs

Best coupler models for grease guns in 2023! Pick your best model!

Below you can find the best grease gun couplers currently available on the market. Take a close look to choose the best model for your needs.

$LockNLube Grease Gun Coupler – The LockNLube grease gun coupler is the best original locking grease coupler, working with different grease fittings and high pressure. But, it’s not ideal for all equipment and tighter zerk fitting models, and you must turn it anti-clockwise. There is still room for improvement.

$LUMAX LX-1403 Silver Heavy-Duty Quick Release Grease Coupler – Best value with the optimal greasing process. Compatible with all standard grease fitting models. The grease coupler locks to prevent mess and leak. Still, not compatible with metric zerk fittings.

$DEWALT Grease Gun Coupler – Best compact grease coupler, with mess-free uses and lock key features to prevent accidents. Excellent for heavy-duty machines and similar standards. Yet it’s not the best solution to replace the grease fitting and jaws so easily.

$Saker Grease Gun Coupler – Best performance for optimal uses and wider applications. The grease gun coupler fits different grease fitting points in different regular and more advanced grease guns. Ideal for heavy-duty tasks. However, it is too wide for recessed grease fitting points.

$Push-on Slotted Right Angle 90-degree Grease Coupler – Best stability and versatility for multiple uses and applications. The grease coupler might be hard to adjust and rough for your needs. Anyhow, it offers maximum security when using it.

$AORRZER Grease Gun Coupler – Best versatility and wider applications for all machine types and other equipment. Easily adjustable to different guns and has a quick lubricating process. Nevertheless, tricky to use.

#1. LockNLube Grease Gun Coupler – Best-selling original locking grease gun coupler

  • Brand: LockNLube
  • Dimensions: ‎3.45 x 0.63 x 1.66 inches
  • Weight: 4.5 ounces
  • Best for: a leakproof seal

Why should you choose the LockNLube grease gun coupler as your top choice?

The LockNLube grease gun coupler uses a specific locking mechanism preventing leaking. The grease goes in, not in the machine. The sliding sleeve ensures the jaws are locked into the zerk. So you won’t have any leaking and too much grease that you later must clean.

Thanks to the compatible design, the LockNLube grease coupler is compatible with all zerk fitting models, all U-joints, and all grease guns. Thus, the LockNLube grease gun coupler is the best-selling original locking grease gun coupler.

Due to the higher pressure rating – 10,000 PSI, the LockNLube grease gun coupler is more advanced than a standard coupler, as it will not release grease wastage under high pressure.

You don’t need to use your hands to attach and hold the LockNLube grease gun coupler to align it and ensure proper lubrication. The hands-free operation is possible due to its ergonomic design. As the coupler locks onto the grease fitting, the pressure sends the lubrication directly to tight spots, hard-to-reach areas, and other tight spaces for optimal greasing.

The LockNLube grease coupler also uses a rebuildable design. The unique features ensure the grease coupler only replaces the jaws and the seal. So the grease coupler will be as good as the new one. The original locking grease coupler is a suitable grease coupler for specific equipment.

  • for all grease fittings
  • seal
  • ergonomic design
  • high-pressure rating
  • not for tighter fittings
  • not suitable for Kubota lawnmowers and other tools

#2. LUMAX LX-1403 Silver Heavy-Duty Quick Release Grease Coupler – Best value

  • Brand: LUMAX
  • Dimensions: ‎4.75 x 1 x 4.75 inches
  • Weight: 3.2 ounces
  • Best for: the leak-resistant greasing mechanism

The LUMAX heavy-duty quick-release grease coupler offers composite construction. The heavy-duty grease gun coupler uses a unique design and premium quality. As a result, the grease gun coupler is suitable for different durable materials.

Thanks to its unique design, the heavy-duty quick-release grease coupler is one of the best grease couplers on the market, as it fits all grease fittings.

Due to its universal fit, the heavy-duty quick-release grease coupler works with all zerk fitting models in air-operated, battery-powered, and hand-operated grease guns.

The grease gun coupler also works with high-pressure & bulk grease pumps. So it offers the best lubrication process and the seal to prevent the leak.

As the LUMAX heavy-duty quick-release grease coupler uses the ergonomic thumb-lever design, the coupler locks onto the fittings and other equipment easily. In addition, the thump-lever will make the coupling and uncoupling effortless.

Plus, due to higher pressure, you can operate well with all clogged fittings, recessed fittings, and NPT fittings. The lubrication process will be effortless due to the locking seal.

Of course, the LUMAX grease coupler offers better greasing control, as you can find several quality control checks to ensure the best lubrication process. The grease coupler uses the integrated non-return valve to ensure the lock seal and prevent the grease leak. So, there won’t be any lubrication waste, and you can prevent mess.

Also, the grease coupler offers hands-free operations since the non-return valve locks the parts into their places, so the fittings are compatible with the greasing points.

  • compact size
  • high pressures
  • flexible hose
  • not for metric zerk fitting models

#3. DEWALT Grease Gun Coupler – Best quality

  • Brand: DEWALT
  • Dimensions: ‎6.88 x 3.25 x 1.13 inches
  • Weight: 1.6 ounces
  • Best for: mess-free grease gun coupler design

The DEWALT grease gun coupler uses an advanced greasing mechanism to ensure the flexible hose and the grease gun generally reach all tight and other problematic spaces for optimal lubrication.

The great gun coupler works well with high operating pressure, up to 10,000 PSI.

In addition, the locks ensure there won’t be any leak, spillage, or mess with the grease used for equipment lubrication. Therefore, you don’t need to worry whether the grease gun leaks and if you need to clean the joints, jaws, and other fittings under pressure.

As the greasing equipment uses a heavy-duty grease coupler, it will be ideal for all heavy-duty tasks, heavier machine models, harvester heads, and similar machinery. So you can quickly and effortlessly finish your greasing tasks.

With an operating pressure of 10,000 PSI, the greasing standards will be efficient and quick, so you can even use only one hand to finish the job. The lock mechanism will not pop out under such conditions, and the fittings will be compatible with the flexible hose for a faster procedure and similar requirements.

It might be too hard to loosen or tighten the jaws, to adjust the working pressure and fittings to your needs. You cannot move the fitting around, and you’re supposed to push it inside to reach all parts.

Thanks to its heavy-duty construction, the grease gun coupler will last longer, and you can use it regardless of all external or working conditions.

  • durable
  • sturdy
  • pressure
  • hard to tighten and loosen the jaws

#4. Saker Grease Gun Coupler – The best performance

  • Brand: Saker
  • Dimensions: ‎4.25 x 1.54 x 1.26 inches
  • Weight: 5.9 ounces
  • Best for: advanced and standard grease guns

The Saker grease gun coupler is a unique model, matching all fitting models and different grease guns for different machine models. The grease gun coupler works with more than 10,000 PSI of pressure – it uses 14,000 PSI and is one of the best grease couplers available.

As it uses reinforced jaws and a high-quality sealing gasket, the grease gun coupler will lock and seal the grease for long-lasting and durable performance. So, the grease gun coupler will be reliable for various heavy-duty operations.

The grease gun coupler is also valuable for its robust-built quality. The grease gun coupler comes with premium-quality zinc-coated alloy steel. Thus, you can use it for an extended period.

Thanks to the smooth retraction mechanism, the grease gun coupler allows you different one-hand operations. As a result, there won’t be pressure and pain on your hands, and you can finish the jobs quickly and efficiently.

In addition to the secure system, the retract mechanism is ideal for locating zerk fittings and at the blind spot. So, the grease gun coupler will not create any mess, spillage, or leak once you use it. The lock mechanism also prevents the coupler and hose from popping out under the 14,000 PSI.

The Saker grease gun coupler is better than standard grease guns as it fits all fitting models and grease guns. Due to the 1/8 NTP, the grease gun coupler matches all grease guns.

  • durable
  • reliable
  • sturdy
  • lock sealing
  • too wide for recessed fitting models

#5. Push-on Slotted Right Angle 90-degree Grease Coupler – Best safety standards

  • Brand: LockNLube
  • Dimensions: ‎4.5 x 1.75 x 1 inches
  • Weight: 1.5 ounces
  • Best for: versatility

The following LockNLube grease gun coupler is an excellent choice for your grease guns, thanks to its key features. First, the grease gun coupler uses the low-profile 90-degree adaptor for all hard-to-reach areas and grease fitting points. Thus, you can finish the job quickly and efficiently without any additional issues.

The LockNLube grease gun coupler creates a leak-free seal to prevent mess, waste, and further complications. Thus, you can use the grease gun coupler for different applications and more robust uses without any issues. The grease coupler will prevent pops out and keep the flexible hose optimal when working with less or more than 10,000 PSI of pressure.

Another benefit is that you don’t have to use any additional tools to ensure the proper fit of the fitting to different grease guns. The grease coupler fits different models, and you can connect it to different models without any issues. Or, you can ensure the proper fit with the adaptor to ensure the appropriate fit of the problematic fitting standards.

As it’s made of heavy-duty materials and composite construction, the grease coupler will last for an extended period, and you can use it for wider applications and machines. The lock mechanism will ensure proper operations, while the robust construction offers correct uses regardless of the working conditions.

Finally, the grease coupler ensures the maximum safety standards for all tractor owners. The system will lock the parts in their designated positions, so there won’t be any accidents.

  • pressure
  • lock mechanism
  • fitting hose
  • rough uses

#6. AORRZER Grease Gun Coupler – The most versatile model

  • Brand: AORRZER
  • Dimensions: ‎4.33 x 1.57 x 0.67 inches
  • Weight: ‎9.8 ounces
  • Best for: ease of use

Finally, our last grease gun coupler is a wonderful grease gun part due to its versatility and robust design.

The construction uses the six-jaw improved design, for stable and reinforced performance, with no oil leakage. The leakproof system is tested with more than 10,000 PSI. The grease coupler works well with the 12,000 PSI.

Thanks to the steel alloy, optimizing the steel thickness and upgrading the original basis. Thus, it’s durable and wear-resistant for multiple and long-lasting uses. The grease coupler will be ideal for different machines and more robust uses without any issues.

Due to its simple design, but sturdy construction, the grease gun coupler uses a one-hand operation system, so there’s no need to hold it when lubricating. In addition, the grease gun coupler will be stable and secure even with one hand, so you can easily adjust it to your needs.

The grease coupler offers the 1/8 NPT fitting, matching all standard grease guns and similar models with pneumatic types. It also fits all manual and electric grease guns, but SAE, DIN, and metric zerk joints and fittings. So, you can use it widely and adjust to all working conditions. For example, you can use the grease coupler for tractors, plows, seeders, disc harrows, and similar large machines.

If you select this grease coupler, you will get a one-year warranty in case you’re unsatisfied, or something goes wrong. In addition, customer support is always at your disposal for all questions.

  • lock system
  • durable
  • versatile
  • difficult to use

Choosing the best grease gun couplers: Best 2023 buyer’s guide

Selecting the best grease gun couplers might be challenging, as multiple models are available. But, we will present you with a few critical features for an informed decision before the final purchase.

Are you ready? Let’s start.

1. Pressure ratings

grease gun coupler reviews

Best grease gun couplers can withstand a minimum of 8,000-10,000 PSI and even more than that. So, it’s necessary to evaluate this parameter before you choose the final grease gun coupler for your needs.

Pay attention that larger grease gun couplers working with more pressure might leak, pop out other parts, and damage the hose.

In addition, such grease gun couplers might cause grease waste, too much excess, and bulk grease. Thus, you must clean the grease couplers and other equipment.

2. High-quality

When choosing the best grease gun coupler, select the one with the strong rebuild kit. These couplers will cover you well in different rugged job sites, dusty construction, and similar places. They can release much more grease, and the stronger rebuild kit will keep the grease and couplers optimal for further use.

Durable and sturdy construction is also necessary for accidents. For instance, a low-profile fall can also cause damage to the poorly built grease coupler, and you must not reduce the quality of the overall grease gun. Otherwise, your grease gun cannot withstand the handling and colossal pressure points.

3. Grease coupler jaws

The grease gun coupler jaws play a crucial role in lubricating the equipment. They are responsible for holding the tools so they can reach all areas and parts, even in the tightest places.

You must ensure the grease gun couplers fit your grease gun and machinery properly and it’s locked to the grease gun and its tip strongly enough to prevent accidents. Otherwise, you will have to replace the parts.

4. Grease fitting

You must ensure the type of grease fitting first and then choose the proper grease gun coupler. You should opt for a versatile element suitable for all fitting types. You can also ensure the ball checks to prevent dust and other contaminants from entering the tube.

In addition, when selecting a grease gun coupler, make sure that it is compatible with standard fitting zerk to avoid having multiple couplers in your toolbox.

Although most couplers are of the standard fitting, it’s important to be cautious and avoid purchasing those that do not meet standard specifications, as you might replace them later.


What is a grease gun coupler?

A grease gun coupler is the linking connection securing a hydraulic grease gun hose or rigid extension to the head of the grease fitting. It allows the grease gun to dispense grease or another lubricant through the grease fitting to the machinery.

Are three different size grease gun couplers?

Yes, couplers come in different sizes, shapes, types, and thread identifications. Some might be 1/8 NPT threads, while others can be bigger or smaller. Check your instruction manual to know the exact dimensions.

How does a grease gun coupler work?

best locking grease gun coupler

The coupler connects the hose with the grease fitting’s head.

So, once the user pulls the trigger or presses the button on the grease gun, the couplers will effectively release the grease or similar lubricants to the fittings and oil the machines.

How to assemble a grease gun coupler?

Follow the steps below:

Attach the coupler to the end of your grease gun

Unscrew the current nozzle from the gun’s end

Screw in the new coupler

Ensure the coupler is tight

Attach the tube or hose connecting the grease gun to its source

Push it into the place until it locks, or thread it onto the end of the coupler

Pump the grease from the grease gun

Are grease gun couplers adjustable?

Some models meet all DIN and SAE metrics and specifications.

Where to buy a saker grease gun coupler?

You can buy it on Amazon and similar websites with tractor supplies or visit local stores with such tools.

So, the best solution is…?

The best grease gun coupler you need is the LockNLube Grease Gun Coupler. The coupler is leakproof, durable, and sturdy for wider uses and more robust applications, regardless of weather and working conditions.

It’s affordable to all farmers, even though it might not be suitable for all tools, but it’s still very popular in the farm world.

Final verdict

Have you found the best grease coupler yet? If you have, hurry and purchase it now. It’s a game changer and will make your farm life easier!

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Ben Bareja

Ben Bareja, the owner-founder-webmaster of This website was conceptualized primarily to serve as an e-library for reference purposes on the principles and practices in crop science, including basic botany. Read more here

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