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.
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National Aeronautics and Space Administration 
Finland 
Slovenia 
Poland 
Czech Republic 
Brazil 
Spain 
Columbia 
Israel 
Singapore 
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Morocco 
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Australia 
Belgium 
Canada 
New Zealand 
France 
Germany 
Republic of Korea 
United Kingdom 
Netherlands 
Portugal 
Italy 
Denmark 
Norway 
Greece 
Turkey 
NATO Maintenance and Supply Agency Classification: Press-fasteners, snap-fasteners & press-studs & parts therefor
NSN 6130-00-168-9356
NSN 6130-00-270-1024
NSN 6110-00-984-3291
NSN 6240-00-787-8329
NSN 6685-00-947-0059
NSN 2925-01-580-2993
NSN 5905-01-423-8857
NSN 5915-01-659-3909
NSN 5915-01-201-5575
NSN 4140-00-827-1821
NSN 5998-01-624-9930
NSN 5975-01-418-0376