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 6135-01-324-7718
NSN 7035-01-359-7460
NSN 5975-00-726-0140
NSN 5975-01-165-0414
NSN 6220-01-174-0221
NSN 5985-00-935-8653
NSN 6650-00-287-5868
NSN 6135-01-204-8712
NSN 6150-00-391-1981
NSN 5950-01-645-4986
NSN 5930-01-385-7605
NSN 5835-01-359-2575