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 5855-01-516-5211
NSN 6110-00-600-6105
NSN 6685-01-406-4482
NSN 5965-01-446-6945
NSN 6105-01-272-9235
NSN 2925-01-202-6451
NSN 2925-01-583-5619
NSN 6240-01-134-6251
NSN 6320-01-582-6668
NSN 2925-01-325-3974
NSN 5895-01-220-9089
NSN 5985-01-514-3296