Osg 4100001311 Thread Mill 3/8-24 Unf 3 Flute Solid Carbide

Product Description

The OSG 4100001311 is a solid carbide helical flute thread mill designed to cut 3/8-24 UNF internal threads in a single helical pass. It carries three right-hand flutes and an EXO coating for extended tool life in ferrous and non-ferrous materials. The cutting diameter is 0.3000 inches with a 0.5830-inch length of cut, and the shank diameter is 5/16 inches. At 3.0000 inches overall length, this tool fits standard CNC machining centers and mill-turn equipment. It is used by machinists and tooling specialists working in precision manufacturing, job shops, and maintenance machining environments.

This thread mill is suited for CNC milling applications requiring accurate 3/8-24 UNF threads in through or blind holes. The helical interpolation method allows a single tool to produce the full thread profile, reducing tool changes and improving thread quality in tight-tolerance work. Series 41000 tools from OSG target precision thread milling in a range of workpiece materials where consistent thread form and surface finish are critical. The EXO coating adds wear resistance and reduces heat buildup at the cutting edge during extended runs.

Key Features

• Solid carbide construction for rigidity and dimensional stability
• EXO coating for improved wear resistance and tool life
• 3 right-hand helical flutes for efficient chip evacuation
• Cuts 3/8-24 UNF threads at 24 teeth per inch
• 0.5830-inch length of cut accommodates standard thread depths
• No coolant-through design — suitable for external flood or mist coolant delivery

Compatibility

Designed as an OEM-style thread milling tool for use in CNC machining centers capable of helical interpolation with a 5/16-inch tool holder or collet chuck.

Installation Notes

Thread mills of this type are installed and operated by machinists on CNC milling or mill-turn equipment programmed for helical interpolation. Ensure the spindle, tool holder, and workpiece fixture are secured and verified before initiating the thread milling cycle. Follow the machine tool builder guidelines and applicable shop safety procedures when setting tool length offsets and spindle speeds. Do not use this tool in manual milling operations or non-interpolating applications.