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 
U.s. Marine Corps 
Dept. of the Navy 
U.s. Coast Guard 
Poland 
Brazil 
Spain 
Israel 
Singapore 
Morocco 
Malaysia 
Australia 
Belgium 
Canada 
New Zealand 
France 
Germany 
Republic of Korea 
United Kingdom 
Netherlands 
Portugal 
Denmark 
Norway 
Greece 
Turkey Classification: Press-fasteners, snap-fasteners & press-studs & parts therefor
NSN 6645-00-527-7258
NSN 6105-01-347-6173
NSN 5925-00-855-1088
NSN 6610-01-444-1490
NSN 5835-01-133-6485
NSN 5950-00-237-5362
NSN 5985-00-707-3473
NSN 5835-01-485-0210
NSN 5855-01-426-5589
NSN 6650-01-333-9155
NSN 5895-01-607-4358
NSN 5999-01-517-9604