Screw has hexagon head, reference to 12p2-2apq120-4
An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.
NSN 7035-00-585-2113
NSN 5930-01-533-4209
NSN 5910-01-462-5775
NSN 5945-01-524-7896
NSN 6110-01-418-4998
NSN 5945-00-244-1212
NSN 5999-00-005-5366
NSN 5945-00-276-9274
NSN 6220-01-260-7994
NSN 6650-00-494-8671
NSN 5915-01-076-8877
NSN 6145-00-937-0976