A cylindrical item which may have wrenching and/or driving facilities and/or shoulders. It is designed to be inserted in a drilled or a pretapped hole, or molded or pressed into soft material to reduce the size of a tapped hole; to provide threads; to add strength, and/or to prevent stripping. It is one of the following: (1) a one-piece, flanged or unflanged, internally threaded item which may have external threads, and/or serrations around the periphery of the collar, designed to engage a serrated lock ring which is not included with the item; (2) a one-piece precision coiled wire; (3) a two-piece item consisting of an internally threaded cylinder and a mating externally threaded part; or (4) a one-piece internally threaded item whose outside diameter is tapered and/or knurled and/or with fin(s). The internal thread of the item may have a locking feature. Excludes items having a sleeve on its underportion which can be clinched or crimped. Excludes bushing, machine thread; nut, plain, knurled; nut, plain, round; nut, plain, clinch and nut, self-locking, clinch. See also nut, plain, plate.
Dept. of the Army 
Dept. of the Air Force 
Dept. of the Navy 
Spain Classification: Press-fasteners, snap-fasteners & press-studs & parts therefor
NSN 6320-01-384-3219
NSN 5975-01-651-8300
NSN 6130-01-170-4059
NSN 6105-01-207-0845
NSN 5935-01-322-8562
NSN 4140-00-079-8453
NSN 5999-00-442-4244
NSN 6645-01-492-5304
NSN 6110-01-640-8441
NSN 5935-01-458-6132
NSN 6105-01-191-4749
NSN 6110-00-839-8026