Widia 2826038 Insert Screw T9 Torx 4-40 Thread

Product Description

The WIDIA 2826038 is a T9 Torx insert screw designed to secure indexable inserts in boring bar toolholders. Manufactured from steel, this screw uses a 4-40 inch thread and is compatible with the Q KEY driver tool. With an overall length of approximately 0.21 inches (5.34 mm), it is a small but critical fastener that maintains proper insert seating and positioning during metal cutting operations. Licensed HVAC and machining professionals alike know that a failed or stripped clamping screw means downtime - this replacement keeps Q-Series boring bars running without interruption.

This insert screw is intended for use in Q-Series multiple circle boring bars used in indexable boring applications. It corresponds to industry standard number QC21 (manufacturers catalog number QC-21) and is suited for shops running boring operations on manual lathes, CNC turning centers, and similar equipment. The Torx drive head resists cam-out during torque application, making it well-suited for repeated insert changes in a production environment.

Key Features

• T9 Torx drive head resists cam-out during insert changes
• 4-40 inch thread size matches Q-Series boring bar insert pockets
• Steel construction for durability under repeated clamping cycles
• Compatible with Q KEY driver for precise torque application
• Corresponds to industry standard number QC21
• Sold individually - order exact quantity needed

Compatibility

Designed for use with WIDIA Q-Series multiple circle boring bars and compatible boring bar toolholders as indicated by industry standard number QC21. Toolholder style compatibility listed as Multiple Circle Boring Bars. Use with the Q KEY driver.

Installation Notes

Insert screw installation and replacement is performed by a machinist or toolroom technician. Before changing the insert or screw, ensure the machine is fully powered down and the spindle is locked per shop safety protocols. Use the specified Q KEY Torx driver to avoid stripping the screw head - do not substitute a standard hex or Phillips driver. Follow the toolholder manufacturer torque guidelines for insert clamping to prevent insert movement during cutting.