Seco 02440228 Lock Screw T15P Torx Plus M3.5 Milling Insert

Product Description

The SECO 02440228 is a countersunk lock screw designed to secure indexable inserts in milling toolholders. It uses a Torx Plus T15P drive for positive engagement and reduced cam-out during tightening. The M3.5 thread size and 12.50 mm overall length make it a direct-fit fastener for compatible indexable milling systems. This screw is a consumable service part — technicians and toolroom machinists replace these routinely as part of insert changeovers and toolholder maintenance. Sold individually per package with a minimum order quantity of 10 units.

This lock screw is used in indexable milling applications where inserts must be clamped securely against cutting forces. It is appropriate for use in production machining environments, toolrooms, and job shops running indexable face mills, shoulder mills, or other insert-style milling cutters that use M3.5 countersunk lock screws with T15P Torx Plus drive geometry. The countersunk head seates flush with the toolholder pocket, keeping the clamping surface clear of the cutting zone.

Key Features

• T15P Torx Plus drive for positive bit engagement and reduced fastener damage during insert changes
• M3.5 thread size for compatibility with indexable milling toolholder insert seats
• Countersunk head design seats flush within the toolholder pocket
• 12.50 mm overall length sized for standard indexable insert clamping depth
• Manufacturer catalog reference: C03512-T15P

Compatibility

Designed for use with indexable milling toolholders that accept M3.5 countersunk lock screws with a T15P Torx Plus drive. Hardware compatibility is with milling inserts as specified in the product attributes. Verify toolholder specifications before ordering.

Installation Notes

Lock screw installation and replacement is performed by machinists and toolroom technicians during indexable insert changeovers. Always de-energize and lock out the machine before accessing the spindle or toolholder. Use a calibrated T15P Torx Plus bit to avoid rounding the drive recess. Do not reuse visibly damaged or stretched lock screws, as fastener failure under cutting loads can damage the toolholder pocket.