Kennametal 5629796 Spiral Flute Pipe Tap 1/8-27 Npt

Product Description

The KENNAMETAL 5629796 is a spiral flute pipe tap designed to cut 1/8-27 NPT internal threads in metal workpieces. Built from high-speed steel (HSS) with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction during threading operations. The 15-degree helix angle and 4-flute right-hand design promote efficient chip evacuation through the flutes, making it well-suited for blind and through-hole pipe thread applications. With a 2-1/2 to 3-1/2 chamfer and a 3/4-inch thread length, this tap is sized for precision NPT threading in light to medium production environments. Licensed machinists and pipe fitters rely on this tool class for creating leak-resistant threaded pipe connections.

The 5629796 is used in applications requiring standard 1/8-27 NPT pipe threads, commonly found in pneumatic fittings, hydraulic manifolds, plumbing connections, and instrumentation ports. The spiral flute geometry makes it particularly effective in materials that produce stringy chips, such as mild steel, aluminum, and certain stainless alloys. It fits manual tapping handles and CNC tapping heads that accept a 7/16-inch shank diameter. This tap is part of the Kennametal T854 series.

Key Features

• 1/8-27 NPT thread size for standard American pipe thread connections
• 15-degree right-hand spiral flute for upward chip evacuation in blind holes
• 4 flutes for balanced cutting action and thread form accuracy
• TiN (titanium nitride) coating reduces wear and extends tool life
• 2-1/2 to 3-1/2 chamfer for gradual thread lead-in
• High-speed steel construction handles a broad range of metallic workpiece materials

Compatibility

Designed as an OEM-style spiral flute pipe tap for use in manual tapping handles, tap wrenches, and CNC or drill press tapping setups that accept a 7/16-inch round shank. Suitable for cutting 1/8-27 NPT threads per standard American National Pipe Thread specifications.

Installation Notes

Secure the workpiece firmly before tapping and ensure the tap is started square to the hole to maintain thread alignment. Apply a suitable cutting fluid for the workpiece material to reduce heat buildup and extend tap life. For CNC applications, verify that the tapping head is set to the correct feed rate matching the 27 TPI pitch. Inspect the tap for wear or chipping after each use and replace when thread quality degrades.