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.
Dept. of the Navy 
Spain 
Thailand 
Canada 
New Zealand 
Turkey NSN 6105-01-114-8036
NSN 5996-01-514-9292
NSN 2925-01-018-1348
NSN 5835-01-290-5925
NSN 5945-01-424-5780
NSN 5996-01-343-9962
NSN 7035-01-622-5984
NSN 5835-01-632-6627
NSN 4140-01-268-2184
NSN 5835-01-480-9215
NSN 5855-01-481-8529
NSN 6645-01-046-4880