Top 10 Best lock grease coupler in 2026

Last Updated - 6/12/2026

🏆Best Choice

LockNLube

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.

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•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

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$34.99

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LockNLube

LockNLube Grease Coupler (NPT No Spare Rebuild Kit)

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•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: Lowest Lifetime Cost
•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!

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$29.99

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LockNLube

LockNLube Grease Gun Coupler XL - Extra reach for recessed grease fittings

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Rated to 10,000 PSI! Locks on, stays on. Does not leak once locked on.
•Hands free - does not pop off under pressure. Easily release from fittings with the thumb lever, even at extreme pressure.
•Fits all standard Grease Guns - 1/8 NPT fitting. Fits all SAE and Metric Zerk fittings. Simply replace your existing coupler.
•Over 3.5" of reach. Great for shielded PTO shafts, axles, harvester heads, U Joints and other recessed grease fittings.
•Includes rebuild kit. Easily replace seal and jaws without replacing the coupler.

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$44.99

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AORRZER

AORRZER Grease Gun Coupler 2 PCS, Strong Lock-on Greases Gun Couplers, 12000 PSI High Pressure Coupler Quick Release Grease, Durable and Compatible with All Grease Guns 1/8" NPT Grease Gun Fittings

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•【Upgrade grease coupler】AORRZER grease gun coupler 2 pcs ，Upgrade-strong 6-jaw coupler, grease gun coupler reinforced jaws and quality sealing gasket ensure long lasting and stable performance tighter and no oil leakage,Use testing: Leak prevention even when tested at extreme pressures of 12,000 PSI or higher.
•【High quality and sturdy】The grease gun coupler is made of upgraded material alloy steel, optimizing the thickness of the steel and upgrading the 6-jaw bite lock on the original basis, quality steel, quality design principle, Wear-resistant and durable Long life span, Lowest lifetime cost, believe me, this will be your best choice!!
•【Simple operation】Grease gun coupler with smooth strong 6-jaw bite lock on function allows one-handed operation, no need to hold when lubricating, after locking the grease gun coupler, you can free your hands to operate the grease gun.
•【Wide application】grease gun coupler fits all 1/8" NPT standard grease gun, Pneumatic Grease Gun, manual grease gun, electric grease gun, also suitable for all DIN and SAE grease nipples and all SAE and metric Zerk joints. Simply replace your existing grease gun coupler and this Strong grease gun tool is ready for use in automotive repair, job site large machinery and axles and drive trains, it is also great for lubricating farm tractors, plows, stump pullers, disc harrows, seeders and more.
•【Customer Service】 AORRZER promises to provide you with a 1-year warranty, as long as you choose the AORRZER grease gun coupler in the use of any problems encountered in the process can always contact us, we will provide you with 24-hour service, so that you have a family-like feeling!
•【Reasons to choose AORRZER】With AORRZER grease gun coupler you not only have a new upgraded and enhanced version (high pressure, leak-proof, fast grease filling, optimized steel thickness, 6-jaw bite lock, one-hand operation, lowest lifetime cost) but also the coupler fits all 1/8" NPT standard grease gun fitting, we also promise a 1-year warranty, so you can be assured that this will be your best choice！

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$27.99

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luckywagon

luckywagon Grease Gun Coupler Black Leakproof Grease Gun Tips Quick Lock Release High Pressure 10,000 PSI Grease Fittings, Dual Handle 6 Jaws Zerk Coupler Compatible with All 1/8" NPT Greases Guns

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•EXTREME PRESSURE RESISTANCE: Forged from CNC-machined alloy steel, this leak-proof grease gun coupler handles industrial-grade lubrication tasks without deformation, withstanding extreme pressures of 10,000 PSI. Outperforms standard models as the ultimate solution for heavy machinery in demanding environments
•PATENTED ANTI-LEAKAGE TECHNOLOGY: Featuring a triple-layered sealing system (aerospace-grade gasket + heavy-duty spring-loaded valve + alloy steel nozzle), the luckywagon grease gun tip ensures zero grease leakage under continuous high-pressure pumping. Backed by our lifetime replacement service for worry-free use
•1-SECOND QUICK-RELEASE MECHANISM: Patented locking & release design enables instant disengagement from grease fittings without residual spillage—ideal for fleet maintenance with 50+ lubrication points. Maintains rugged performance after 30,000 plug-and-unplug cycles, ensuring long-term reliability
•ERGONOMIC DUAL-HANDLE DESIGN: Six precision jaws with dual ergonomic handles provide a 360° secure grip on zerk fittings, reducing hand fatigue by 50% compared to single-handle designs. Safely release both hands to control the grease guns with precision and ease
•UNIVERSAL COMPATIBILITY: Compatible with all 1/8" NPT grease guns (battery-powered, pneumatic, or manual). Made with automotive industrial-grade materials, it performs reliably in harsh farm, construction, or marine environments—ideal for lubricating trucks, tractors, lawn mowers, trailers, and excavators
•LIFETIME SUPPORT PROMISE: Unlike limited warranties, our grease coupler includes lifetime technical support. In the rare event of failure, contact our team for prompt troubleshooting or a free replacement. The luckywagon black heavy-duty grease gun coupler—built for professionals, backed by our commitment to quality

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$12.99

$14.99

-13%

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AORRZER

AORRZER Grease Gun Coupler, Strong Lock on Greases Gun Couplers, 12000 PSI Quick Release Grease Coupler with 12" Spring Flex Hose, Compatible with All Grease Guns 1/8" NPT Grease Gun Fitting(1 PCS)

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•【Upgrade grease coupler】AORRZER grease gun coupler with 12 Inch Spring Flex Hose，Upgrade-strong 6-jaw coupler, grease gun coupler reinforced jaws and quality sealing gasket ensure long lasting and stable performance tighter and no oil leakage,Use testing: Leak prevention even when tested at extreme pressures of 12,000 PSI or higher.
•【High quality and sturdy】The grease gun coupler is made of upgraded material alloy steel, optimizing the thickness of the steel and upgrading the 6-jaw bite lock on the original basis, quality steel, quality design principle, Wear-resistant and durable Long life span, Lowest lifetime cost, believe me, this will be your best choice!!
•【Simple operation】Grease gun coupler with smooth strong 6-jaw bite lock on function allows one-handed operation, no need to hold when lubricating, after locking the grease gun coupler, you can free your hands to operate the grease gun.
•【Wide application】grease gun coupler fits all 1/8" NPT standard grease gun, Pneumatic Grease Gun, manual grease gun, electric grease gun, also suitable for all DIN and SAE grease nipples and all SAE and metric Zerk joints. Simply replace your existing grease gun coupler and this Strong grease gun tool is ready for use in automotive repair, job site large machinery and axles and drive trains, it is also great for lubricating farm tractors, plows, stump pullers, disc harrows, seeders and more.
•【Customer Service】 AORRZER promises to provide you with a 1-year warranty, as long as you choose the AORRZER grease gun coupler in the use of any problems encountered in the process can always contact us, we will provide you with 24-hour service, so that you have a family-like feeling!
•【Reasons to choose AORRZER】With AORRZER grease gun coupler you not only have a new upgraded and enhanced version (high pressure, leak-proof, fast grease filling, optimized steel thickness, 6-jaw bite lock, one-hand operation, lowest lifetime cost) but also the coupler fits all 1/8" NPT standard grease gun fitting, we also promise a 1-year warranty, so you can be assured that this will be your best choice！

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$19.50

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LockNLube

LockNLube Simple 90˚ Grease Coupler Adapter

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Designed to perfection
•Highly useful and convenient
•It is easy to use
•Comes in safe and secure packaging

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$11.99

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FJXBYWM

FJXBYWM 2PCS Grease Gun Coupler Grease Gun Lock Coupler, Grease Gun Tips Locking Grease Joint Fittings Compatible with All Grease Guns, Suitable for Automobiles, Ships Industrial Machinery Etc.

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Double Handle Grease Gun Coupler Lock and Load Ease: Our Grease Gun Coupler makes lubrication a breeze. With its innovative lock-on design and quick-release mechanism, lock on grease tip effortlessly attach and detach onto grease fittings. Say goodbye to messy spills and hello to smooth, hassle-free greasing.
•Grease Gun Coupler Locking Universal Compatibility: Versatility meets performance with our locking grease gun coupler. Whether it's a pneumatic grease gun tool, battery-operated grease gun, or even a heavy-duty pistol grip grease gun, our grease gun lock is compatible with a wide range of grease guns and fittings. No more searching for the right fit - we've got you covered grease gun zerk.
•Grease Gun Couplers Durability Redefined: Built tough for heavy-duty use, our Grease Gun Coupler is engineered to last. Featuring reinforced construction and a sturdy double-handle design,grease tip ensures reliable performance even in the most demanding environments. Get ready to tackle any greasing task with confidence.
•Grease Couplers Precision Lubrication: Say goodbye to guesswork with our Grease Gun Coupler. lock and lube grease gun fittings, grease gun couplings delivers grease exactly where you need it, minimizing waste and maximizing efficiency. Keep your machinery running smoothly with pinpoint accuracy.
•Grease Gun Couplings Client Service : We stand behind our Grease Gun Coupler with prides. If you're not completely satisfied with your lock and lube grease gun fittings，simply reach out to us. Our dedicated team is here to assist you and ensure your greasing experience is nothing short of exceptional.

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$8.53

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BRAVECOW

BRAVECOW Grease Gun Coupler Locks Oil Injection Zerk Fittings Original Locking Grease Coupler Rated 10,000 PSI

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•【Non-slip sleeve handle】New upgrade handle with non-slip sleeve,allows one-hand operation, anti-slip design, convenient, no need to hold while greasing, a single person can also complete the greasing, making your greasing job easy and fun.
•【Wide application】grease gun coupler fits all 1/8" NPT standard grease gun, Pneumatic Grease Gun, manual grease gun, electric grease gun, also suitable for SAE and metric Zerk joints. Simply replace your existing grease gun coupler.
•【Unique 6 Jaw Design】Grease gun coupler Upgrade-strong 6-jaw design nhance durability and longevity, and quick easy to lock and release lube. No observation is required when oiling. Quality sealing gasket prevents the grease gun locking tip from leaking regardless.
•【High quality and sturdy】The grease gun coupler is made of upgraded material alloy steel with thicker springs providing stronger locking force and preventing leaks
•【Leak-free Design】 Enhanced jaws and premium sealing gaskets prevent leakage even at extreme pressures of 10000 PSI, ensuring long time service and stable performance. No more wasted grease mess everywhere.

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$6.99

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Akeoil

AKEOIL Grease Gun Coupler, Grease Joint Fittings, 12000PSI High Pressure Grease Nozzle Fittings, Compatible With All 1/8" NPT Grease Guns, For greasing all machinery and equipment filling

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•【PROFESSIONAL DESIGN】Double handle symmetrical design, saving time and effort in the process of use, while the 6-claw coupler design is easier to close and buckle the grease nozzle, tighter, no oil leakage.
•【 HIGH SERENGTH SERVICE LIFE 】Using high quality carbon steel material, surface galvanized treatment, play the role of corrosion and rust prevention, high strength spring to make the work life longer, durable, to achieve the long-term use effect
•【 WIDE RANGE OF APPLICATION 】 Butter gun is suitable for automobile, mechanical equipment maintenance, farm axle and transmission system, truck, industrial equipment maintenance and other hard-to-reach grease parts, also suitable for most manual grease guns, the maximum working pressure of 12000PSI
•【SIMPLE OPERATION】The fat gun coupler has a smooth and powerful 3 jaw locking function, one hand operation, lubrication without need to hold, after locking can liberate your hands, save time and effort, is a good helper for your work
•【AFTER-SALES AND COMMITMENT 】to provide customers with quality products is our pursuit, you have any questions in the process of use please timely communicate with us, our service team will reply to you within 24 hours, give you a satisfactory answer, I wish you a happy shopping

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