Osg 1207600 Spiral Point Tap 6-40 Unf 2 Flute Hss

Product Description

The OSG 1207600 is a spiral point tap designed for cutting internal threads in a wide range of ferrous and non-ferrous materials. It produces a 6-40 UNF right-hand thread using a 2-flute, plug chamfer geometry that pushes chips ahead of the cut, keeping the flutes clear during through-hole tapping operations. The tap is manufactured from high-speed steel with a bright finish and carries an H2 thread limit for 2B and 3B class-of-fit applications. Overall length is 2 inches with a thread length of 0.39 inches and a shank diameter of 0.141 inches. It is part of the OSG Series 105 line and is suited for machinists, toolmakers, and maintenance professionals working in production and MRO environments.

This tap is rated for use in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. The plug chamfer requires a through-hole or a hole with sufficient chip clearance beyond the threaded depth. Its compact size and 6-40 UNF specification make it a common choice for instrument work, electronics assemblies, and precision mechanical components where fine-thread engagement is required. Coolant-through capability is not included in this design.

Key Features

• Spiral point geometry pushes chips forward, reducing clogging in through-hole applications
• High-speed steel construction provides good wear resistance across a broad material range
• H2 thread limit suits 2B and 3B class-of-fit tolerances
• Plug chamfer style for standard through-hole entry
• Bright finish with no coating, suitable for use with cutting fluid or oil
• Right-hand thread direction, 6-40 UNF specification

Compatibility

Rated for tapping aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. Designed as an OEM-style production tap for 6-40 UNF through-hole applications in Series 105 tooling programs.

Installation Notes

This tap should be installed in a rigid tapping holder or a floating tap holder using standard tap wrenches or CNC tapping attachments. Ensure the workpiece is securely fixtured and the pilot hole diameter is correct for a 6-40 UNF tap before beginning the operation. Apply a suitable cutting fluid or tapping oil for the workpiece material to extend tool life and improve thread finish. Do not reverse the tap under load without reducing feed to prevent breakage in small-diameter applications.