Countersink in top of head
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 5965-01-446-2562
NSN 6110-01-223-3505
NSN 5945-01-147-4083
NSN 5998-01-458-2341
NSN 5999-00-070-6625
NSN 5965-00-461-2594
NSN 5920-01-542-9143
NSN 6685-00-338-2796
NSN 5855-01-188-4049
NSN 5910-01-417-2597
NSN 5960-01-474-4843
NSN 5996-00-050-0907