Hex head
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 2925-01-100-3694
NSN 6150-01-226-7089
NSN 5945-01-504-0708
NSN 5945-00-100-1261
NSN 6320-00-242-3300
NSN 5945-01-075-8240
NSN 5905-01-299-5139
NSN 5998-01-319-3348
NSN 5855-00-337-3679
NSN 5910-01-467-9918
NSN 6650-01-333-3646
NSN 5935-00-960-6260