Material is grade 12.9
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 5920-00-901-7419
NSN 6240-00-233-3481
NSN 6135-01-579-3534
NSN 5935-01-329-6271
NSN 5990-01-430-3152
NSN 5930-01-410-3436
NSN 6620-01-262-9489
NSN 6240-01-460-2097
NSN 5950-01-619-4812
NSN 5998-01-508-4501
NSN 6650-00-779-7294
NSN 4140-01-223-0116