Tool-flo 9HSTC4 Clamp Screw 5/16-24 Thread 5/32 Hex Socket

Product Description

The TOOL-FLO 9HSTC4 is a clamp screw designed for indexable toolholders used in grooving and threading operations. It features a 5/16-24 inch thread (M9 metric equivalent) and a 5/32 inch hex socket drive. With an overall length of 1.16 inches, this screw secures the clamp and insert assembly in place during machining. It is a precision hardware component intended for use by machinists and toolroom professionals working with indexable insert tooling systems on CNC lathes and manual turning equipment.

This clamp screw is suited for grooving and threading toolholders in production and job-shop environments. It is a direct-fit replacement or spare hardware component for technicians maintaining indexable toolholder assemblies. Compatible toolholder styles include CLVOR and FGNR series holders as well as SI-CLHOR series units. The screw interfaces with CL-30 and TC-311 style clamps and supports insert compatibility across a range of APIP, CR, and PGN series inserts as specified by TOOL-FLO.

Key Features

• 5/16-24 inch thread size with M9 metric equivalent for secure clamping force
• 5/32 inch hex socket drive for precise torquing with standard hex keys
• Overall length of 1.16 inches sized for grooving and threading toolholder bodies
• Compatible with CL-30 and TC-311 clamp styles
• Supports multiple APIP, CR, and PGN series indexable insert families
• UNSPSC Code 31161500 classified hardware component

Compatibility

Compatible toolholder styles: CLVOR-166, CLVOR-168, CLVOR-206, CLVOR-208, CLVOR-248, CLVOR-25M6, CLVOR-32M6, CLVOR-40M6, CLVOR-40M8, FGNR 16-6A, FGNR-16-2A, FGNR-16-7A, FGNR-20-2654, FGNR-20-2814, FGNR-20-2A, FGNR-20-3004, FGNR-20-4203, SI-CLHOR-329, SI-CLHOR-409. Compatible clamps: CL-30, TC-311. Compatible inserts: APIP 265-4, APIP 281-4, APIP 300-4, APIP 420-3, CR-5B75-5I, CR-8R-7I, PGN 2A/213-3, PGN 6A, PGN 7A.

Installation Notes

Installation is performed by machining professionals during toolholder setup or maintenance. Power down and lock out the machine spindle before replacing clamp screws on any indexable toolholder. Use a correctly sized 5/32 inch hex key to seat and tighten the screw without stripping the socket. Do not substitute screws of a different thread pitch or drive size, as improper hardware can cause insert movement or ejection during cutting.