Osg 7808109 Cap Screw TP8 Torx Indexable Milling

Product Description

The OSG 7808109 is a TP8 Torx cap screw designed to secure indexable inserts in milling cutter toolholders. It features a flat head profile and is part of the OSG Phoenix series. The Torx drive interface provides reliable torque transfer during insert clamping, reducing the risk of fastener cam-out during tightening. This screw is specified for use with PSE-style toolholders and ZD_T11 insert geometry, making it a direct-fit hardware component for technicians maintaining or setting up indexable milling assemblies. Machining professionals and toolroom technicians rely on exact-spec replacement screws to maintain consistent clamping force and insert positioning across production runs.

This cap screw is intended for indexable milling cutter applications in machining and metalworking environments. It is used when replacing worn or damaged clamping hardware in PSE-style toolholders compatible with ZD_T11 inserts. The Phoenix series designation indicates it is engineered to OSG specifications for that toolholder family. Typical install scenarios include insert changeovers on vertical or horizontal milling machines in job shop, production, and maintenance machining settings.

Key Features

• TP8 Torx drive for positive engagement and reduced cam-out risk during tightening
• Flat head profile seats flush within the toolholder insert pocket
• Designed for PSE toolholder style compatibility
• Compatible with ZD_T11 complete insert designation
• Part of the OSG Phoenix series for consistent OEM-spec hardware replacement
• Industry Standard Number FS25673P for cross-reference sourcing

Compatibility

Specified for use with PSE-style indexable toolholders and ZD_T11 inserts within the OSG Phoenix series. Industry Standard Number FS25673P may be used for cross-reference to equivalent hardware from other sources.

Installation Notes

Installation is typically performed by a machinist or toolroom technician during routine insert indexing or replacement. Ensure the spindle is stopped and the machine is in a safe, locked-out state before handling toolholder hardware. Use a calibrated Torx T8 key or driver to seat the screw; do not over-torque, as cap screws in indexable toolholders are precision fasteners with defined clamping requirements per the toolholder manufacturer. Inspect the screw threads and the toolholder bore for wear or damage before installing a replacement screw.