Grey 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 6220-00-066-3345
NSN 6240-00-478-3858
NSN 2925-01-588-3507
NSN 6145-00-899-6306
NSN 5915-00-358-2407
NSN 6620-00-269-8950
NSN 5935-01-379-7470
NSN 5996-01-337-1120
NSN
NSN 6150-01-061-4137
NSN 6110-01-575-1365
NSN 6650-01-477-2124