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 5905-01-478-9494
NSN 5925-01-056-7608
NSN 5975-01-555-8712
NSN 6240-01-400-4212
NSN 5930-01-147-5693
NSN 5895-01-030-9472
NSN 5915-00-473-8819
NSN 5855-00-149-0766
NSN 5925-01-415-9358
NSN 5996-01-412-3038
NSN 6135-00-635-9187
NSN 5910-00-654-5496