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 5895-01-219-3315
NSN 6240-00-306-9214
NSN 5935-01-156-5794
NSN 6650-00-587-6917
NSN 7035-01-555-9723
NSN 5935-00-160-9686
NSN 6645-00-256-4072
NSN 5965-00-950-0602
NSN 5905-00-624-5521
NSN 5945-00-378-1284
NSN 6105-00-125-7964
NSN 6135-01-167-7604