V-COIL Thread Insert (refill pack) "free running" type "S" BSF 1/4 x 26 - 1.0xD (10 pcs.)

Manufactured from high quality chromium nickel stainless steel, V-Coil inserts provide high strength internal threads that resist the effects of temperature and corrosion.

Their unique design ensures superior threads whose compound performance cannot be reproduced by any other single fastening method.

Available in two basic forms, free running or screw locking, they are much lighter and less expensive than any other equivalent type of thread insert and because of their compact size they can generally be incorporated into existing designs where no previous provision has been made.

Free Running - Type "S"

Produced from precision profiled austenitic stainless steel wire wound into a helical spiral, V-Coil 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 head 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.