Special Features:

Screw cap self locking; fasteners covered by mil-s-1222 and referred to this note shall also conform to a of 12% elongation in a length of four diameters

Properties:

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.