Seco 00057668 Lock Screw T6 Torx 2-56 Thread Indexable

Product Description

The SECO 00057668 is a lock screw designed to secure indexable inserts in turning toolholders. It features a T6 Torx drive and a 2-56 inch thread, conforming to Industry Standard Number CS-120. The overall length measures 0.155 inches and the head diameter is 0.115 inches. Weighing 0.02 pounds per unit, this screw is a compact, precision fastener used by machinists and toolroom technicians to clamp indexable carbide inserts firmly in place during turning operations. Proper insert clamping directly affects tool stability, surface finish, and insert life.

This lock screw is intended for use in indexable turning toolholders that accept a CS-120 standard clamping screw. It is suited to CNC and manual lathe applications where indexable inserts must be locked securely before cutting. The 2-56 thread size and T6 Torx drive are standard in indexable tooling systems, making this screw a common service replacement item stocked in toolrooms and machine shops. Minimum order quantity is 10 units; each package contains 1 unit.

Key Features

• T6 Torx drive for positive, cam-out-resistant torque application
• 2-56 inch thread matches CS-120 industry standard insert clamping specification
• Overall length of 0.155 inches for compact seating in turning toolholders
• Head diameter of 0.115 inches fits standard CS-120 insert pocket geometry
• Designed specifically for indexable turning insert hardware compatibility

Compatibility

Compatible with indexable turning toolholders requiring a CS-120 standard lock screw with a 2-56 thread and T6 Torx drive. Intended as a direct-fit replacement or service spare for toolholders specifying Industry Standard Number CS-120.

Installation Notes

Installation is performed by toolroom technicians or machinists as part of routine insert indexing or replacement. Use a calibrated T6 Torx driver or key to seat and torque the screw — avoid impact tools on small-diameter insert screws. Ensure the insert pocket and screw threads are clean and free of chips before installation. Do not overtighten, as 2-56 thread screws are susceptible to shear at excessive torque.