Carmex S-8 Insert Screw Indexable Threading Torx Drive

Product Description

The CARMEX S-8 is an insert screw designed to secure indexable cutting inserts in threading toolholders. This is a Torx drive fastener built to Industry Standard S8, ensuring cross-brand dimensional compatibility with toolholders that accept S8-series clamping hardware. The inscribed circle diameter of 0.18750 inches confirms fitment with the corresponding insert seat geometry. Machinists and toolroom technicians use these screws as routine replacement hardware when an existing screw is stripped, lost, or damaged during insert changes. Sold individually, with a minimum order quantity of 10 pieces.

This insert screw is intended for indexable threading operations, where a secure, repeatable insert clamp is critical to thread form accuracy and tool life. Torx drive geometry reduces cam-out during tightening compared to hex socket designs, making it a preferred fastener style in high-volume insert change environments. Suitable for use in both CNC turning centers and manual lathes equipped with compatible threading toolholders.

Key Features

• Industry Standard S8 designation for broad cross-brand toolholder compatibility
• Torx drive type reduces cam-out and extends screw service life
• Designed specifically for indexable threading insert seats
• Insert inscribed circle of 0.18750 inches matches corresponding insert geometry
• Replacement hardware for stripped or damaged clamping screws

Compatibility

Designed for use with indexable threading inserts and toolholders that accept Industry Standard S8 insert screws with a 0.18750-inch inscribed circle specification.

Installation Notes

Insert screw replacement is performed by qualified machinists or toolroom technicians during routine insert changes or maintenance. Disengage the machine and ensure the spindle is fully stopped before accessing the toolholder. Use the correct Torx key or driver to avoid rounding the drive recess. Do not overtighten, as insert screws are precision fasteners with manufacturer-specified torque requirements that should be confirmed against the toolholder documentation.