Whitworth Wire Thread Repair Inserts BSW 1/4" 20 TPI  10 off.

Inserts 1.0D

Length installed Approx 1/4"

Produced from precision profiled austenitic  stainless steel wire wound into a helical spiral, free running inserts have  a spring like appearance. When installed using any one of a variety of manual  or automatic tools they provide strong permanent internal threads which resist  heat and corrosion. Once fitted their position is maintained by the action of  radial pressure between their coils and the flanks of the tapped hole.

This pressure exists because their free diameter is  larger, by a calculated amount, than their installed diameter.

Inserts are 1.0D  installed length this means 1.0 x diameter. Other installed length are available  please email if this is your requirement for prices.

Inserts are priced  and supplied in packs of 10