Alfa Tools 5/16-18 x 1.5D Helical Thread Insert

The Alfa Tools TI66222 5/16-18 x 1.5D Helical Thread Insert is a precision-engineered stainless steel wire insert designed to restore stripped or damaged threads and reinforce new threads with superior strength and wear resistance. Built to Unified National Coarse (UNC) standards and manufactured from high-grade, corrosion-resistant stainless steel, this free-running helical coil insert delivers permanent, high-strength internal threads that meet or exceed original fastener performance. With a nominal length of 1.5 times the bolt diameter, the TI66222 enhances load distribution and thread engagement, making it ideal for demanding repair, maintenance, and OEM production applications across automotive, aerospace, industrial, and manufacturing environments.