LockNLube GC81011 Locking Grease Coupler Lock & Lube

The LockNLube GC81011 is a locking grease coupler designed to stop leaks and prevent blow-offs during routine lubrication. Built around a sliding sleeve and thumb lever, the coupler’s four steel jaws clamp firmly to SAE or metric Zerk fittings and hold under pressure up to 10,000 PSI. When the job is done, a press of the thumb lever releases the jaws—even if the line is still loaded—so technicians can move on without wrestling the hose. A 1/8″ NPT inlet threads onto battery, pneumatic, or manual grease guns from common brands, allowing quick retrofit across service bays and field trucks.

This kit also includes a spare rebuild set (seal and jaws) so the coupler can be renewed instead of replaced. By keeping grease in the fitting—not on the machine—crews reduce cleanup, protect components, and use less grease on every cycle. For shops maintaining fleets, heavy equipment, or agricultural machinery, the GC81011 is a practical way to make greasing faster, cleaner, and more predictable.

LockNLube Locking Grease Coupler Lock & Lube At a Glance

• Locks on, stays on: Four-jaw clamp holds to Zerk fittings up to 10,000 PSI for leak-free greasing.
• Thumb-lever release: Disconnects easily, even under pressure, to avoid broken fittings.
• 1/8″ NPT inlet: Threads onto most grease guns—battery, pneumatic, or manual.
• Works on SAE & metric Zerks: Reliable seal on recessed and hard-to-reach fittings.
• Rebuildable design: Replaceable seal and jaws extend service life and lower costs.
• Clean application: Grease goes into the bearing, reducing mess and waste.
• All-brand compatibility: Fits popular grease gun platforms used in shops and field service.

Markets

• Fleet Maintenance & Transportation Leak-free greasing for trucks, trailers, and heavy road equipment.
• Construction & Heavy Equipment Speeds daily lube points on loaders, excavators, and telehandlers.
• Agriculture & Forestry Reliable connection on tractors, implements, and mills in dusty environments.
• Manufacturing & Industrial Plants Supports preventive maintenance with consistent, clean lubrication.
• Municipal & Public Works Standardizes greasing across mixed equipment fleets.
• Trade Schools & Training Programs Demonstrates safe, repeatable greasing practices for students.

Technicians in these settings need a grease coupler that saves time and prevents rework. The GC81011’s locking jaws create a secure, repeatable seal on a Zerk fitting so operators can pump without holding the hose. The thumb-lever release breaks the connection cleanly, even when pressure remains in the line—helpful on recessed fittings where side loading can damage the Zerk. A universal 1/8″ NPT thread fits common grease guns, simplifying setup across multiple bays and service trucks. With a spare rebuild kit included, shops can swap seals and jaws in minutes and keep the same coupler in service, cutting replacement spend while maintaining clean, efficient lubrication on a tight schedule.

LockNLube GC81011 Locking Grease Coupler Lock & Lube Features

• Locks on, stays on, won’t leak. Rated up to 10,000 PSI
• Easily disconnects, even under pressure. No more broken Zerks
• 1/8″ NPT compatible with all grease guns – battery, pneumatic, manual
• Grease goes in, not on, the machine
• Works on all Zerk fittings, SAE and metric
• Available with or without a spare rebuild kit! The LockNLube® is the world’s only rebuildable grease coupler. Lowest lifetime cost.
• Patented Locking Technology. US Patent #8955544
• As seen on TruckU on the Motortrend Channel!

LockNLube GC81011 Locking Grease Coupler Lock & Lube Includes

• (1) LockNLube GC81011 Locking Grease Coupler
• (1) Spare Rebuild Kit (seal and jaws)

LockNLube GC81011 Locking Grease Coupler Lock & Lube Specifications

• Model: GC81011
• Inlet Thread: 1/8″ NPT
• Pressure Rating: Up to 10,000 PSI
• Fitting Compatibility: SAE and metric Zerk fittings, including recessed locations
• Grease Gun Compatibility: Battery, pneumatic, and manual grease guns
• Construction: Four steel jaws with sliding-sleeve lock
• Rebuildability: Seal and jaw set replaceable

Why Professionals Choose the LockNLube Locking Grease Coupler Lock & Lube

Maintenance teams pick this locking grease coupler to stop leaks and keep a steady seal on a Zerk fitting while the grease gun is pumping. The 1/8″ NPT connection threads onto existing equipment in seconds, and the 10,000 PSI rating handles high-pressure applications found on heavy machinery. With a thumb-lever release, the coupler comes off cleanly even under pressure, cutting the risk of broken Zerks and downtime. Because the coupler is rebuildable, shops replace the seal and jaws instead of buying a new head, keeping lifetime cost down. For crews searching terms like “locking grease coupler” or “grease gun coupler for recessed fittings,” the GC81011 delivers a clean connection, reliable flow, and fast disconnect that make daily lubrication consistent and efficient.