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 
Poland 
Spain 
Singapore 
Malaysia 
Australia 
Canada 
New Zealand 
Germany 
Republic of Korea 
United Kingdom 
Netherlands 
Italy 
Norway 
Greece 
Turkey Classification: Press-fasteners, snap-fasteners & press-studs & parts therefor
NSN 5985-01-473-2399
NSN 5990-00-905-9556
NSN 5999-01-147-2419
NSN 5920-00-644-3285
NSN 6145-00-493-4073
NSN 6240-01-208-0401
NSN 5975-01-106-3595
NSN 4140-01-602-3944
NSN 4140-01-038-7659
NSN 6145-01-108-6401
NSN 5990-01-433-3786
NSN 5975-01-111-8477