Osg 8005702 Spiral Flute Sti Tap 6-32 Unc Hss

Product Description

The OSG 8005702 is a high speed steel spiral flute STI (Screw Thread Insert) tap designed for cutting 6-32 UNC threads in a variety of metals and engineering materials. It features a 3-flute design with a 50-degree helix angle, which promotes efficient chip evacuation by pulling chips up and out of the hole during tapping. The bottoming chamfer allows threading close to the bottom of a blind hole. An elektraLUBE finish reduces friction and extends tool life. The tap measures 2 inches overall in length with an 11/16 inch thread length and carries an H3 thread limit for precision fit.

This tap is intended for machinists, toolroom technicians, and maintenance professionals working with STI thread inserts in applications where a standard thread is cut to accept a helical coil insert for thread repair or reinforcement. It is well suited for use on machine tap handles and CNC tapping cycles in production and repair environments. The 6-32 UNC thread size is common in small fastener and instrument applications across industrial, aerospace, and general manufacturing settings.

Key Features

• 6-32 UNC thread form cut to STI specification for use with helical coil thread inserts
• 50-degree spiral flute helix angle for upward chip flow in blind holes
• Bottoming chamfer for threading close to the bottom of a blind hole
• elektraLUBE finish reduces friction and improves tool life in dry or minimal-lubrication tapping
• H3 thread limit for controlled tolerance fit
• High speed steel construction for durability across a range of workpiece materials

Compatibility

Designed as an OEM-style replacement or standard production tap for use in applications requiring 6-32 UNC STI tapped holes to accept helical coil thread inserts in blind-hole configurations.

Installation Notes

Installation is performed by machinists or maintenance technicians using a tap wrench, tapping head, or CNC spindle with appropriate tapping chuck. Ensure the workpiece is securely fixtured and the pilot hole diameter is correctly sized for the 6-32 UNC STI thread form before tapping. Apply cutting fluid or rely on the elektraLUBE finish as appropriate for the workpiece material. Inspect the tap for wear or chipping regularly, as HSS taps used in hard materials are subject to breakage if excessive force is applied.