Hertel R837547T-S Thread Forming Pipe Tap 1/8-27 Npt

Product Description

The HERTEL R837547T-S is a titanium nitride (TiN) coated, high speed steel thread forming pipe tap designed for cutting 1/8-27 NPT internal pipe threads. Unlike cutting taps, this thread forming tap displaces material rather than removing chips, producing stronger threads with better surface finish in ductile metals. The overall length is 2.125 inches, with a thread length of 0.75 inches and a shank diameter of 0.4375 inches. At 0.06 pounds, it is compact and well-suited for use in tight or confined work areas. The TiN coating extends tool life by reducing friction and improving wear resistance across repeated use cycles.

This tap is used by plumbers, pipefitters, and HVAC technicians when threading fittings, manifolds, ports, or enclosures that require a standard 1/8-27 NPT connection. It is appropriate for residential and light commercial work where ductile materials such as aluminum, mild steel, or brass are being threaded. It fits standard tap wrenches or machine holders sized for a 0.328-inch square drive. Typical applications include adding pipe thread ports to valve bodies, pump housings, and control assemblies.

Key Features

• TiN coating reduces friction and extends tool life compared to uncoated high speed steel
• Thread forming design displaces material rather than cutting chips, resulting in stronger threads
• High speed steel construction handles a wide range of ductile metals
• 1/8-27 NPT thread form for standard tapered pipe thread connections
• Compact 2.125-inch overall length suits confined installation access
• 0.328-inch square drive compatible with standard tap wrenches and machine holders

Compatibility

Designed as an OEM-style threading tool for use in applications requiring a 1/8-27 NPT tapered pipe thread in ductile metals.

Installation Notes

This tap should be installed and used by qualified machinists, pipefitters, or HVAC technicians familiar with thread forming operations. Always secure the workpiece before tapping and apply an appropriate cutting or forming fluid to the tap and work surface. Confirm the correct pilot hole diameter for the material being threaded before starting, as thread forming requires a larger pilot hole than cutting taps. Do not use on brittle or cast materials, as thread forming is not suitable for those applications.