How does NAG FASTMAN Screw Thread
SCREW THREAD INSERTRETENTION PRINCIPLE
In the free state, the FASTMAN Insert is larger in diameter
than the nominal size.
But, when assembled in a hole tapped to correct dimensions
to receive it, the FASTMAN Insert is held in place by the
spring-like pressure of the high tensile stainless steel wire.
The FASTMAN Insert provides a permanent internal thread which
conforms to standard thread specification.
does NAG FASTMAN Screw Lock Inserts
SCREW LOCK INSERTLOCKING PRINCIPLE
One or more grip coils near the centre of the FASTMAN Screw-Lock
Insert holds screw or bolt securely against loosening.
They maintain a strong, constant, spring-like pressure on
The one-piece Screw-Lock Insert puts the lock inside the tapped
hole eliminating the cost, weight and space of lock nuts,
lock washers, tab washers or lock wiring.