HeliCoil – Tanged / Tangless / Screw Lock

Tangless Coil Inserts are a continuous, helically-coiled, bi-directional, wire design. This innovative design allows for installation using a drive notch located at each end of the coil insert instead of a tang located at one end of the insert.

Because Tangless Coil Inserts have a notch at both ends, this eliminates the need to orient the insert during installation and saves on production cost. But that’s not all…

Once installed, Tangless Coil Insert are identical in form, fit, and function to conventional tanged inserts (Coil Thread, HeliCoil, Bollhoff, Recoil, Powercoil, Baercoil, Skycoil etc.), and install into the same STI tapped holes.

In order for male threaded fasteners to properly be positioned into tanged inserts, the tangs have to be broken off. This increases total installation time and requires additional tooling, thus, resulting in higher installation cost. With Tangless Coil Inserts this process is completely eliminated resulting in lower installation cost per hole.

In applications that require blind holes, tanged inserts require additional space below the insert in order to break-off the tang and not damage the parent material. When using Tangless Coil Inserts the space between the insert and the bottom of the hole is greatly reduced. This leads to a reduction in size and weight of machined parts

Screw Lock Inserts exert a prevailing torque on male threaded fasteners to prevent loosening due to vibration or impact. Locking inserts eliminate the need for costly and less desirable locking mechanisms. They are excellent in adjusting screw applications by preventing the male fastener from creeping.