Scientific Cutting Tools TM330-18NPTF Thread Mill

Scientific Cutting Tools TM330-18NPTF is a solid carbide, straight-flute thread mill engineered to cut NPTF threads in 1/4-18 and 3/8-18 sizes, suitable for internal or external threading on pipe fittings and hydraulic components. The tool features a 0.330" diameter, 4 flutes, a 0.693" length of cut, a 0.375" shank diameter, and a 3.50" overall length, with crest-cut, full-profile geometry designed to produce precise, leak-tight NPTF threads. Coating options are available to boost wear resistance and cutting speeds, including TiAlN-coated and AlTiN+ variants (e.g., TM330-18NPTF-A), while the base uncoated form remains part of the TM330-18NPTF family. This tool is optimized for clean, high-precision NPTF threading and is compatible with both internal and external milling operations.