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 5975-01-276-0606
NSN 6150-00-462-6365
NSN 5990-00-864-8575
NSN 5990-01-514-8030
NSN 5835-01-270-7899
NSN 5996-01-633-7979
NSN 5935-00-452-4223
NSN 5855-01-027-1571
NSN 5975-01-127-2453
NSN 6135-00-165-3756
NSN 6145-00-284-1514
NSN 6620-01-054-9346