Cleveland C64103 Pipe Tap 1-11/2 Npt 5 Flute Hss

Product Description

The CLEVELAND C64103 is a 1 to 11-1/2 NPT interrupted thread pipe tap designed for cutting internal pipe threads in metal workpieces. Manufactured from high speed steel with a bright finish, this tap features 5 flutes and a plug chamfer configuration. The interrupted thread design reduces cutting torque and helps clear chips during the tapping operation, making it well-suited for threading tough materials. Overall length is 3.75 inches, with a thread length of 1.75 inches and a shank diameter of 1.125 inches. It is used by machinists, pipefitters, and plumbing contractors who need accurate NPT threads in production or maintenance settings.

This tap is intended for creating standard NPT tapered pipe threads in ferrous materials including alloy tool steel and carbon steel. The plug chamfer provides a moderate lead-in, making it appropriate for through-hole pipe threading applications where a starting tap has already been used or where full thread engagement is needed near the entry point. The 5-flute design improves surface finish and distributes cutting load across more cutting edges compared to fewer-flute configurations. Typical applications include threading pipe fittings, manifold ports, and hydraulic or pneumatic block passages in industrial and mechanical service environments.

Key Features

• Interrupted thread geometry reduces cutting torque and improves chip evacuation in tough ferrous materials
• 5 flutes distribute cutting load and improve thread finish quality
• Plug chamfer provides moderate lead-in suitable for through-hole NPT threading
• High speed steel construction delivers durability in alloy tool steel and carbon steel applications
• Bright finish with no coating interference on cutting edges
• Regular hook geometry compatible with standard tapping chucks and equipment

Compatibility

Designed for cutting 1 to 11-1/2 NPT tapered pipe threads in alloy tool steel and carbon steel workpieces. Fits standard tapping holders and machine spindles accepting a 1.125-inch shank diameter.

Installation Notes

This tap is installed and operated by machinists or pipefitters using a tapping machine, drill press, or CNC machining center equipped with a suitable tapping chuck. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct NPT tap drill size before beginning the threading operation. Use an appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Inspect the tap for chipping or wear before each use and do not force a worn or damaged tap.