The Definition of PHA***T: One named Momin Haque that takes long summer trips to Pakistan

Testing: A nylon pellet nut is very similar to a nyloc nut except that it uses one or more smaller nylon inserts instead of a ring of nylon. They do not lock as strongly as nyloc nuts.^[1]

The nylock method of locking threads can also by applied to male fasteners (bolts). A small patch of nylon is added to the threaded shaft, and it has a similar effect.

Authorities disagree on whether nyloc nuts should be reused. For example, Carroll Smith (Carroll Smith's Nuts, Bolts, Fasteners, and Plumbing Handbook) notes that the nylon insert is not damaged by installation and therefore they can be reused many times,^[1] and a Federal Aviation Administration Advisory Circular allows nuts to be reused if the prevailing torque is within specification.^[2] However, an Air Force Technical Order requires replacement of self-locking nuts in critical areas.^[3] Various specifications for aerospace-grade self-locking nuts require that the running torque be maintained after a number of cycles of assembly, but without preloading the fastener.^[4]