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 
Defense Threat Reduction Agency 
Dept. of the Navy 
National Aeronautics and Space Administration 
Austria 
Poland 
Czech Republic 
Brazil 
Spain 
Singapore 
Morocco 
Malaysia 
Australia 
Belgium 
Canada 
New Zealand 
France 
Germany 
Republic of Korea 
United Kingdom 
Netherlands 
Portugal 
Italy 
Denmark 
Norway 
Greece 
Turkey Classification: Press-fasteners, snap-fasteners & press-studs & parts therefor
NSN 6145-00-921-7990
NSN 6220-01-442-9084
NSN 7035-01-029-7221
NSN 5930-01-567-1042
NSN 5965-01-512-9525
NSN 6320-00-831-2227
NSN 5945-00-661-0506
NSN 6685-00-922-5079
NSN 6130-00-222-6216
NSN 5945-00-260-4333
NSN 4140-00-273-9884
NSN 5905-00-642-8130