Seco 02440260 Lock Screw TP9 Torx Plus M3.5 Thread Milling

Product Description

The SECO 02440260 is a countersunk lock screw designed to secure indexable inserts in milling toolholders. It uses a Torx Plus TP9 drive, which requires a T09P-3 key driver for installation and removal. The M3.5 thread size is the standard for this class of insert-clamping hardware. At 4.00 mm overall length and a listed weight of approximately 0.01 pounds, this is a precision fastener engineered to withstand the clamping loads and vibration conditions common in indexable milling applications. Replacement of worn or damaged lock screws is a routine part of toolholder maintenance for machinists and toolroom technicians.

This lock screw is used in indexable milling toolholders that accept M3.5 insert-clamping screws with a Torx Plus TP9 drive. It is suited for production milling environments where indexable carbide inserts are regularly rotated or replaced. The T09P-3 key driver compatibility ensures proper torque application to the fastener without rounding the drive recess. This screw is sold individually per package, with a minimum order quantity of 10 units.

Key Features

• Torx Plus TP9 drive for positive engagement and reduced cam-out risk
• M3.5 thread size matches standard indexable milling insert clamping specifications
• Countersunk head design seats flush with the toolholder pocket
• 4.00 mm overall length for correct seating depth in compatible toolholders
• Compatible with T09P-3 key driver for proper installation torque
• Sold in minimum order quantities of 10 for shop stock replenishment

Compatibility

Designed for use with indexable milling toolholders requiring an M3.5 Torx Plus TP9 lock screw. Compatible insert types include the 1103 series per supplier data. Always verify toolholder specifications before ordering to confirm thread size and drive type match.

Installation Notes

Lock screw installation and replacement should be performed by a qualified machinist or toolroom technician. Power down and de-energize the machine spindle before servicing any toolholder or insert. Use only the specified T09P-3 Torx Plus key driver to seat the screw and avoid stripping the drive recess. Inspect the thread bore in the toolholder for damage or contamination before installing a replacement screw.