Perma-Coil Helicoil Kit for Sash Repair

Repair stripped threads in a variety of metals with this handy kit. The helically coiled inserts are made from stainless steel that has been rolled to a carefully controlled diamond shape thread form. Designed to be slightly oversized in diameter, the insert expands outward with a spring-like action that securely grips the wall of the parent material to provide a much stronger, permanent thread.

• 1221-304
• M4 x 0.7
• Metric