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.
Germany 
United Kingdom Classification: Press-fasteners, snap-fasteners & press-studs & parts therefor
NSN 6130-01-055-2227
NSN 4140-01-555-3124
NSN 5935-01-401-5324
NSN 5960-01-243-0007
NSN 6220-01-072-7575
NSN 6650-00-914-6897
NSN 4140-01-052-5221
NSN 5910-01-595-6126
NSN 5975-00-987-5352
NSN 6620-01-633-8443
NSN 4140-01-592-4133
NSN 5950-01-577-0001