Helical Wire inserts are commonly referred to as “screw thread” inserts. These inserts make it possible to securely join two mechanical components together without the risk of a screw “backing out” due to friction, use or fatigue.

In addition, screw thread inserts are crafted from a variety of materials and finishes that are denser than parent materials to ultimately strengthen tapped holes in lightweight materials and alloys. This creates a secure joint with reduced weight and improved corrosion resistance which is vitally important for aircraft, military hardware, medical devices and technology.

Helical Wire provides a full line of S.T.I. Taps- which create threads in a drilled hole. These threads then engage the insert when inserted into the parent material.

Gauging a hole helps verify that the diameter of the hole is correct for the installation of the insert. Helical Wire recommends our customers calibrate gauges on a regular basis as an over-used gauge can produce inaccurate results, thereby lessening the accuracy of the reading.

When gauging tapped holes that have been thoroughly cleaned or may have a protective finish applied, be sure to gauge the entire depth of the tapped hole. Using your Go-No Go gauge, the Go member must run freely through entire depth of hole. The No-Go member must not exceed 2 ½ turns into tapped hole.