Scientific Cutting Tools Tm 290-16H Thread Mill 3/8-16 Unc

Product Description

The SCIENTIFIC CUTTING TOOLS TM 290-16H is a solid carbide helical flute thread mill designed for cutting 3/8-16 UNC threads in both internal and external applications. Built from submicron carbide grade, this tool delivers precise thread geometry across a 0.29-inch cutting diameter and a 0.775-inch length of cut. With 4 right-hand helical flutes and a bright uncoated finish, it suits high-accuracy threading operations on CNC machining centers. The 5/16-inch shank diameter provides rigid toolholder engagement in standard collet and end mill holders. Licensed machinists and tooling specialists handling close-tolerance thread work in production or job shop environments will find this tool well-suited to the task.

This thread mill is intended for use in CNC milling applications where a single tool must produce both internal and external 3/8-16 UNC threads. It performs in materials compatible with uncoated solid carbide tooling, making it suitable for aluminum, brass, and similar non-ferrous metals as well as some ferrous applications at appropriate speeds and feeds. The helical flute design promotes chip evacuation and reduces cutting forces compared to tap-style threading. It is appropriate for use in both production and prototype machining environments where thread quality and repeatability are critical.

Key Features

• Cuts 3/8-16 UNC threads in internal and external configurations with a single tool
• Submicron solid carbide construction for rigidity and wear resistance
• 4 right-hand helical flutes for improved chip evacuation during threading
• 0.29-inch cutting diameter with 0.775-inch length of cut
• 5/16-inch shank diameter fits standard collet and end mill holders
• Bright uncoated finish suited to a wide range of base materials

Compatibility

Designed for use in CNC machining centers equipped with standard collet systems accepting a 5/16-inch shank, producing 3/8-16 UNC threads to standard thread form specifications.

Installation Notes

Thread mills require CNC machines capable of helical interpolation; confirm machine and CAM software support before use. Secure the shank fully in a collet or end mill holder and verify runout before cutting. Always follow the tool manufacturer and machine builder guidelines for speeds, feeds, and depth of cut for the workpiece material. Inspect the tool for chipping or wear before each use and do not exceed the rated length of cut.