0.5 in. Width between flats
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.
NSN 5915-00-411-8944
NSN 5895-00-599-1827
NSN 6145-01-353-6211
NSN 6650-00-736-8456
NSN 6645-01-209-6881
NSN 5998-01-385-4981
NSN 6105-01-372-9157
NSN 5965-00-387-6880
NSN 6240-01-624-5371
NSN 6150-00-661-0184
NSN 6650-00-947-4380
NSN 5975-01-370-3520