Undercut 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.
Classification: Bolts and bolts and their nuts or washers exported in the same shipment
NSN 5895-01-560-9476
NSN 6110-01-252-8516
NSN 6320-00-779-5923
NSN 6610-01-583-9635
NSN 5960-00-062-0204
NSN 2925-01-394-5650
NSN 6620-00-491-3818
NSN 5950-00-964-4019
NSN 6110-00-006-7987
NSN 5835-00-309-2373
NSN 5915-01-336-7669
NSN 6110-01-161-0768