Head undercut
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.
Classification: Bolts and bolts and their nuts or washers exported in the same shipment
NSN 6240-00-370-5862
NSN 4140-01-276-1903
NSN 6610-00-417-4299
NSN 5935-00-597-1752
NSN 5920-01-343-5346
NSN 6145-00-578-7522
NSN 5910-00-933-0597
NSN 5910-00-248-5470
NSN 6610-01-263-0425
NSN 5920-01-502-9264
NSN 5905-01-112-0818
NSN 5950-01-206-1335