This FASTMAN Screw-Lock one-piece insert provides all the
thread protection of the Standard (Free Running) Thread Insert,
PLUS an exclusive internal locking feature that eliminates
the need of clumsy protruding lock-nuts, lock-wiring and other
supplementary locking devices.
Further it saves cost, space and weight, and permits simplified
The insert is a permanently integrated part of the component
permitting repeated service repair disassembly and reassembly,
with locking action remaining unchanged.