Hex nut with a nylon-fill collar, commonly known as Nylock nuts, at its back end and an enlarged circular base flaring out from the front end of the nut. When an extremely threaded fastener reaches the collar, the threads and nylon form a tight, frictional fit as the nylon applies downward pressure that forces contact between the internal and external threads. Available in steel nylon lock nuts and stainless steel nylon lock nuts.
Nylon Insert Locknuts are available in different series/types including:
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