Seco 02879139 Insert Screw Torx Plus M3.5 Milling

Product Description

The SECO 02879139 is an insert screw designed to secure indexable cutting inserts in milling toolholders. Using a Torx Plus drive, this M3.5 threaded fastener provides reliable clamping force to keep inserts seated accurately during machining operations. With an overall length of 11.00 mm, the screw is engineered to the tight tolerances that indexable tooling systems demand. Licensed machinists, toolroom technicians, and CNC setup personnel use these screws as direct replacements when insert screws are lost, damaged, or stripped. Proper insert retention is critical to tool life, surface finish, and operator safety, making this a frequently stocked consumable in any shop running SECO indexable milling tools.

This insert screw is intended for use in indexable milling applications where M3.5 Torx Plus insert screws are specified. It is a replacement hardware item suited to production and job-shop environments running face mills, shoulder mills, and other indexable milling cutters that require this fastener specification. The screw ships individually, making it practical to replace single fasteners without purchasing bulk hardware kits.

Key Features

• Torx Plus drive for improved torque transfer and reduced cam-out compared to standard hex drives
• M3.5 thread size matched to indexable milling toolholders requiring this fastener
• 11.00 mm overall length for correct seating depth in compatible insert pockets
• Single-unit packaging allows precise replenishment without excess inventory
• Manufactured to indexable tooling tolerances for consistent insert clamping

Compatibility

Designed as an OEM-style replacement insert screw for indexable milling toolholders that specify an M3.5 Torx Plus fastener. Verify the thread size and drive type against the toolholder manufacturer specifications before ordering.

Installation Notes

Insert screw replacement and torque procedures should be performed by qualified machinists or toolroom technicians familiar with indexable tooling systems. Always index or remove the cutting insert before replacing the screw to avoid contact with sharp edges. Use a calibrated Torx Plus key or driver of the correct size and apply the torque value specified in the toolholder manufacturer documentation — do not substitute a generic hex key. Inspect the insert pocket and screw bore for chips or damage before installing the new screw.