Cleveland C64131 Pipe Tap 1/4-18 Npsf 4 Flute Hss

Product Description

The CLEVELAND C64131 is a standard pipe tap designed to cut internal 1/4-18 NPSF (National Pipe Straight Fuel) threads in a range of materials. Built from high speed steel with a bright, uncoated finish, it delivers consistent thread form in cast iron, steel, aluminum, and other non-ferrous metals. The tap measures 2.438 inches overall length with a 1.063-inch thread length, and features a 4-flute, regular hook geometry for controlled chip evacuation during tapping operations. It is a single-piece, individually packaged tool suited for machine shops, maintenance facilities, and trade professionals cutting pipe threads in fittings, housings, or manifolds.

NPSF threads are used in fuel and hydraulic line fittings where a straight thread with a sealant or o-ring creates the pressure seal. This tap is appropriate for through-hole and shallow blind pipe thread applications in residential and light commercial plumbing, HVAC refrigerant piping fittings, and fuel system components. The 1/4-18 size is one of the most common pipe thread configurations found in gas valves, pressure fittings, and small-diameter piping assemblies across multiple trades.

Key Features

• 1/4-18 NPSF thread form for straight pipe thread applications
• High speed steel construction for cutting cast iron, steel, and non-ferrous metals including aluminum
• 4-flute regular hook geometry promotes controlled chip removal
• Bright, uncoated finish for straightforward inspection and re-sharpening
• 0.5625-inch shank diameter with 0.4375-inch square drive length for standard tap wrench or machine chuck use
• Compact overall length of 2.438 inches suits tight-clearance work

Compatibility

Designed as a standard OEM-style pipe tap for cutting 1/4-18 NPSF internal pipe threads in compatible materials including cast iron, steel, and non-ferrous metals such as aluminum.

Installation Notes

Pipe taps should be installed and used by qualified machinists or trade professionals following standard tapping procedures. Always secure the workpiece and use appropriate cutting fluid for the material being tapped to extend tool life and protect thread quality. Back the tap off periodically to break chips when tapping by hand. Follow applicable shop safety practices and ensure the tap wrench or machine spindle is properly aligned to avoid tap breakage.