Special Features:

This item will be used as part of a system supporting the launch/or recovery of aircraft and is essential to system performance or operation, or the preservation of life or safety of operating personel. As such the item has been designated as a critical operation ite (cai) any deviation from this specification without written approval from the navel air system command (navair) , support equipment and aircraft launch and recovery equipment, is strictly prohibited.

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.