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 6150-00-015-6179
NSN 5925-01-171-5693
NSN 5920-01-322-7553
NSN 5945-01-393-8374
NSN 6240-01-465-6485
NSN 5920-01-259-3140
NSN 5998-01-259-0181
NSN 6145-00-104-7789
NSN 6105-01-189-6161
NSN 7035-00-803-3056
NSN 7035-01-646-0272
NSN 4140-01-652-5868