Seco 00040421 Lock Screw Indexable T15P Torx Plus M4x0.7

Product Description

The SECO 00040421 is a countersunk lock screw designed to secure indexable inserts in threading toolholders. It uses a T15P Torx Plus drive for positive engagement and reduced cam-out risk during tightening. The M4 x 0.7 thread pitch is the standard for this class of insert-clamping hardware. At 10.50 mm overall length, it fits the pocket geometry of compatible threading toolholders without protruding into the cutting zone. Installation and replacement are performed by CNC machinists and toolroom technicians as part of routine insert indexing or changeover procedures.

This lock screw is suited for threading applications where indexable inserts must be held securely under interrupted cuts, high feed rates, and the lateral forces common in thread-turning and thread-milling operations. It is packaged individually but carries a minimum order quantity of 10 units, making it appropriate for shops stocking spare hardware for active tooling setups.

Key Features

• T15P Torx Plus drive reduces cam-out and fastener damage during insert changes
• M4 x 0.7 thread is the standard pitch for indexable insert lock screws in this class
• Countersunk head sits flush within the insert pocket for unobstructed chip flow
• 10.50 mm overall length sized for threading toolholder pocket depth
• Compatible insert style: C04011-T15P
• Minimum order quantity of 10 units supports stocking for production environments

Compatibility

Designed for use with indexable inserts in threading toolholders. Compatible insert style designation is C04011-T15P as specified by the manufacturer. Verify toolholder pocket thread specification before ordering.

Installation Notes

Lock screw installation and insert indexing should be performed by qualified machinists or toolroom personnel with the machine powered down and spindle locked. Use a calibrated T15P Torx Plus key and follow the toolholder manufacturer's recommended seating procedure. Do not use impact drivers or apply excessive torque, as overtightening can shear the screw or damage the insert pocket. Inspect the screw threads and drive recess for wear at each insert change and replace any fastener showing deformation.