HeliCoil Screw Thread Inserts

About HeliCoil Inserts

HeliCoil inserts are helically wound, precision formed coils of extremely hard stainless steel (18-8) diamond shaped wire. When installed into a HeliCoil tapped hole, the HeliCoil insert provides permanent conventional screw threads. It has a driving “tang” for installation which is notched for easy removal.


Stripped & Fixed

When threads become stripped, worn or damaged for any reason, the strength and reliability of the bolt is greatly reduced. Potentially dangerous situations are eliminated when the damaged threads are repaired with HeliCoil inserts. They quickly and permanently restore stripped,worn or damaged threads to their original size and condition.

HeliCoil inserts provide stronger, more reliable threads than the original tapped hole and at the same time, eliminate the possibility of thread wear, corrosion, galling, seizing and rust.


Retention Principle

HeliCoil wire thread inserts are larger in diameter before installation than the tapped hole. During installation, the HeliCoil inserting tool reduces the diameter of the leading coil so that the insert can enter the tapped hole. After successful installation, each high tensile stainless steel coil of the HeliCoil insert expands outward against the tapped hole to permanently anchor it in the hole.


Quality & Reliability

Since its inception in 1938, Emhart Technologies HeliCoil screw thread inserts have become synonymous with thread repair and they have also been recognised for their superior quality and reliability. They have an extensive background of tension, torque, shear, vibration and fatigue tests conducted by the American industry's leading companies as well as the U.S. Military.

Successful applications in the fields of aviation, electronics, industrial, automotive and military equipment provide a wealth of experience and confidence in the performance and reliability of HeliCoil inserts.

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