Pro-lube HC/12/4/N Grease Gun Standard Coupler 1/8 Npt

Product Description

The PRO-LUBE HC/12/4/N is a standard grease gun coupler rated for 10,000 psi operating pressure. Built from spring steel, it connects a grease gun to standard grease fittings with a 1/8 inch NPT thread connection. The coupler locks onto zerk fittings to deliver grease under high pressure without leakage or blowoff. It is a standard replacement or spare coupler for professional grease guns used in fleet maintenance, industrial equipment service, and general mechanical work. Lubrication technicians, fleet mechanics, and maintenance professionals install this part as a direct coupler swap when the original coupler fails to seal or lock properly.

This coupler is suited for use with standard grease guns in commercial and industrial maintenance environments. It fits applications where 1/8 inch NPT threaded connections are required and where operating pressures reach up to 10,000 psi. Typical install scenarios include heavy equipment lubrication, conveyor and bearing maintenance, and automotive undercarriage service. The spring steel construction holds up under repeated high-cycle use in shop and field environments.

Key Features

• Rated to 10,000 psi operating pressure for high-pressure grease gun applications
• Spring steel construction for durability under repeated use
• 1/8 inch NPT thread for secure connection to compatible grease gun hoses and extensions
• Standard coupler design fits common zerk-style grease fittings
• Compact form factor for use in tight-clearance lubrication points

Compatibility

Designed as a standard replacement coupler for grease guns with 1/8 inch NPT threaded hose or extension connections. Compatible with standard zerk-type grease fittings found across a wide range of commercial and industrial equipment.

Installation Notes

Installation is performed by maintenance technicians and lubrication service professionals. Relieve all pressure from the grease gun before removing or replacing the coupler. Thread the coupler onto the grease gun hose or extension hand-tight, then snug with a wrench - do not overtighten spring steel fittings. Verify the coupler locks and releases cleanly on a test fitting before returning the gun to service.