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 
U.s. Marine Corps 
Dept. of the Navy 
National Aeronautics and Space Administration 
Austria 
Finland 
Lithuania 
Poland 
Brazil 
Spain 
Israel 
Singapore 
Kuwait 
Saudi Arabia 
Malaysia 
Australia 
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 2925-01-569-1549
NSN 5945-01-065-0887
NSN 7035-01-325-0536
NSN 5999-01-465-3670
NSN 5915-01-462-4834
NSN 5855-00-951-6483
NSN 5855-01-321-3881
NSN 5855-00-482-9876
NSN 6620-01-076-1340
NSN 6320-01-145-6786
NSN 5915-01-421-4352
NSN 4140-01-400-3610