A pellet
is a firm nylon plug that is inserted into a
drilled hole in the threads of the fastener making
it self-locking and still fully adjustable. This
form of locking can be used in nearly any application
at any temperature. Its high internal strength
and resiliency help to prevent deformation
after repeated usage. In addition to nylon, pellet
is also available in Vespel and KEL-F.