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 6240-01-460-2097
NSN 4140-00-200-0970
NSN 5999-01-130-2607
NSN 6685-01-614-7437
NSN 5855-01-473-5800
NSN 6650-00-004-3683
NSN 5905-00-068-2558
NSN 6145-00-269-4271
NSN 5990-01-166-2237
NSN 5990-01-076-6858
NSN 6150-01-446-3499
NSN 5990-00-079-0932