Dayco 89220 Automatic Belt Tensioner

Perma-Coil Helically Coiled Inserts Are Made Of Stainless Steel Wire That Has Been Rolled To A Carefully Controlled Thread Form. When Installed, Perma-Coil Inserts Adjust To A Tapped Hole, Becoming A Functional Thread With A Strength Exceeding The Original. Perma-Coil Inserts And Repair Kits Are Designed To Repair Stripped Threads In A Variety Of Metals. Aluminum, Aluminum Alloys, Steel, And Cast Iron. If The Original Threads Can Be Stripped, Perma-Coil Inserts Can Repair Them. By Following The Detailed Instructions Enclosed In Every Perma-Coil Kit, Even An Inexperienced Do-It-Yourselfer Can Repair Stripped Threads, Permanently.