An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.
Dept. of the Army 
Dept. of the Air Force 
U.s. Marine Corps 
Dept. of the Navy 
Spain NSN 6110-01-421-1777
NSN 6135-01-381-4675
NSN 5965-01-127-0389
NSN 5965-00-647-3972
NSN 6645-01-571-8578
NSN 6620-01-517-0014
NSN 6620-01-327-3011
NSN 6320-01-102-0799
NSN 6610-00-618-6192
NSN 5930-01-029-2803
NSN 6130-00-924-6238
NSN 6220-01-058-6369