Special Features:

Essential to weapon system performance or operation, or the preservation of life or safety of operating personnel

Properties:

An item fabricated from nonmetallic material designed to be used where there is no relative motion between joined parts. Items having a square or rectangular cross section must be a single piece whose ends may have been secured together to form a specific shape. It may be formed to a specific shape, except round, with or without joints. It may have fabric, cord or metal reinforcement. Except for molded corners, end cuts, and mounting facilities such as holes, slots, press-fit buttons, or the like, the item must be of one continuous cross section. For straight items with square end cuts and without mounting holes, slots or press-fit buttons see rubber strip. For items with round cross sections see seal, nonmetallic round section. Excludes gasket and packing, preformed.