Description

The SECO 00040420 is a countersunk lock screw designed to secure indexable inserts in milling toolholders. It uses a Torx Plus drive configuration at TP15 and carries an M2.5 thread size. The screw measures 9.30 millimeters in overall length and weighs approximately 0.03 pounds. It is engineered to provide consistent clamping force on indexable inserts during milling operations, making it a standard consumable hardware item for machinists and toolroom technicians who work with indexable cutting systems. Replacement of worn or damaged lock screws is a routine part of insert change procedures.

This lock screw is suited for use in milling applications where indexable inserts are seated in compatible toolholders. It is compatible with the 218.20/A toolholder style and is driven using the T15P-3 key driver. The Insert Style compatibility is listed as C04009-T15P, and it is compatible with SPMX 09 series inserts. This screw is sold individually but carries a minimum order quantity of 10 units, making it practical to stock as a consumable alongside insert inventory in production or job shop environments.

Key Features

Torx Plus drive at TP15 for positive engagement and reduced cam-out during tightening
M2.5 thread size for precise fit in indexable toolholder insert pockets
Countersunk head type designed to seat flush within the insert pocket
9.30 millimeter overall length for proper thread engagement depth
Compatible with T15P-3 key driver for use with standard Torx Plus wrenches
Designed for milling indexable tooling systems

Compatibility

Compatible with the 218.20/A toolholder style, C04009-T15P insert style, and SPMX 09 series inserts. Driven with the T15P-3 key driver. Minimum order quantity is 10 units per order.

Installation Notes

Lock screw replacement and insert changes should be performed by qualified machinists or toolroom technicians with the machine powered down and spindle locked out per applicable lockout/tagout procedures. Use the specified T15P-3 Torx Plus key driver to avoid rounding the drive recess. Do not overtighten or use impact tools, as this can damage the screw threads or the toolholder pocket. Inspect the screw and toolholder threads for wear or contamination before each insert change.