The Development of the Original Wire Thread Insert

A Heli‐Coil insert is defined quite simply; it is diamond section wire formed into a helical coil and wound, by means of appropriate tooling, into a pre‐tapped hole. Made mainly from austenitic nickel chrome stainless steel — it is also available in phosphor bronze, Nimonic 90 and Inconel X‐750 it provides a permanent thread, wholly resistant to wear and the effects of corrosion. High temperatures are taken care of by the use of heat resistant nickel alloy and Inconel wire.