Sumitomo 2G00040 Insert Screw T6 Torx M2 X 0.4

Product Description

The SUMITOMO 2G00040 is a flat-head insert screw designed to secure indexable cutting inserts in boring bar toolholders. Part of the Sumi-UFO series, this screw uses a T6 Torx drive and an M2 x 0.4 thread to deliver precise, repeatable clamping force on indexable inserts. The flat head profile seats flush against the insert pocket, keeping the cutting edge properly indexed and reducing the risk of insert movement under cutting loads. At 4.30 millimeters overall length, it is sized for small-bore toolholding applications. Machinists and toolroom technicians working with Sumitomo indexable boring bars will find this a direct-fit replacement for worn or damaged clamping hardware.

This insert screw is used in machining environments where indexable boring bars require reliable insert retention. It is suited for CNC turning centers, manual lathes, and boring operations where insert stability directly affects hole tolerance and surface finish. The M2 x 0.4 thread pitch and T6 Torx drive are standard on Sumi-UFO series boring bar bodies. Technicians performing insert changes on production floors or in toolrooms will stock this screw as a consumable maintenance item alongside their indexable insert inventory.

Key Features

• T6 Torx drive minimizes cam-out risk during insert changes
• M2 x 0.4 thread size matches Sumi-UFO series boring bar insert pockets
• Flat head seating keeps insert flush and properly indexed
• 4.30 mm overall length sized for compact boring bar toolholders
• 0.1063 inch head size for compatibility with standard T6 Torx keys
• Lightweight at 0.05 pounds, suitable for high-volume stocking

Compatibility

Designed for use with Sumitomo Sumi-UFO series indexable boring bar toolholders that accept M2 x 0.4 insert clamping screws with a T6 Torx drive and flat head. Compatible with indexable insert hardware as specified by the Sumi-UFO series toolholder documentation.

Installation Notes

Insert screw replacement is typically performed by a machinist or toolroom technician during scheduled insert indexing or toolholder maintenance. Power down and lock out the machine spindle before servicing any toolholder. Use a calibrated T6 Torx key or driver to seat the screw to the toolholder manufacturer's recommended feel — do not overtorque, as M2 screws are susceptible to thread stripping. Inspect the screw threads and the toolholder pocket threads for wear before reinstalling a used screw.