Value Collection L51942 Grease Fitting Adapter 1/4-28 to 1/8 Npt

Product Description

The VALUE COLLECTION L51942 is a grease fitting adapter designed to convert a 1/4-28 male taper thread to a 1/8-inch female NPTF thread. This small-format adapter allows technicians to connect standard grease fittings to ports threaded with 1/8-inch NPTF connections, bridging two common thread standards in a single compact fitting. It is used in lubrication systems found in industrial machinery, automotive equipment, and general mechanical assemblies. Installation is typically performed by mechanics, millwrights, or maintenance technicians during equipment service or rebuild work.

This adapter is suited for applications where a grease gun coupler or zerk fitting must interface with an 1/8-inch NPTF-threaded port. Common scenarios include retrofitting lubrication points on aging equipment, adapting imported components with metric or non-standard ports, and rebuilding bearing housings or pivot assemblies that require re-tapping or thread conversion. The taper male thread on the 1/4-28 side ensures a secure engagement with standard grease fitting seats.

Key Features

• 1/4-28 male taper thread on the outlet side for standard grease fitting compatibility
• 1/8-inch female NPTF thread on the inlet side for secure pressure-tight engagement
• Compact form factor suitable for tight installation spaces
• Bridges two common thread standards in lubrication system assemblies
• Sold as a single unit with no minimum order beyond one piece

Compatibility

Designed as a standard thread-conversion adapter for lubrication fittings with 1/4-28 male taper outlets and 1/8-inch female NPTF port inlets across general industrial and mechanical equipment applications.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician. Relieve all system pressure and wipe the port clean before threading in the adapter. Apply appropriate thread sealant or PTFE tape to the NPTF threads as required by the application. Do not overtighten — use a properly sized wrench and stop once the fitting is seated and snug to avoid thread damage.