Pro-lube HC/21L/N Quick Lock Grease Coupler Extra Long

Product Description

The PRO-LUBE HC/21L/N is an extra-long quick lock grease coupler built for high-pressure lubrication work. It features a six-point contact design that delivers a firm, leak-resistant connection to standard grease and zerk fittings. When the thumb lever is actuated, the engagement system retracts inside the steel wall, allowing fast disengagement even while the line remains under pressure. The zinc finish resists corrosion in shop and field environments. This coupler is installed by mechanics, fleet technicians, lubrication technicians, and industrial maintenance professionals who require a reliable, repeatable connection during greasing operations.

This coupler is suited for high-pressure grease gun applications in automotive, heavy equipment, agricultural, and industrial maintenance settings. The extra-long body provides clearance in tight or recessed fitting locations where standard-length couplers cannot seat properly. The female NPT thread connection makes it compatible with standard grease gun hose ends commonly found in professional service environments.

Key Features

• Six-point contact design for secure engagement on grease and zerk fittings
• Thumb lever actuation allows disengagement under pressure without mess or blowback
• Extra-long body provides access in recessed or hard-to-reach fitting locations
• Steel construction with zinc finish for corrosion resistance
• Female NPT thread connection fits standard grease gun hose ends
• Rated for high-pressure grease applications

Compatibility

Designed as a replacement or upgrade quick lock grease coupler for high-pressure grease guns with female NPT hose connections, compatible with standard grease and zerk fittings in automotive, agricultural, and industrial applications.

Installation Notes

Installation and replacement should be performed by qualified lubrication or mechanical technicians. Relieve all pressure from the grease gun and hose before removing or attaching the coupler. Thread the female NPT connection onto the grease gun hose end and ensure it is seated before applying pressure. Inspect the coupler for wear or damage at regular service intervals.