Solid single or composition cross-sectional shape style, 0.932 inches minimum and 0.937 inches maximum outside diameter, 0.750 inches minimum and 0.755 inches maximum aperture diameter, 0.060 inches nominal cross-sectional thickness, spruance class dd (963); arleigh burke class ddg; forrestal class cv; austin ship class lpd-4 amphibious transport docks; kidd class ddg; ticonderoga class cg (47); nimitz class cvn; sturgeon class ssn (637); los angeles class ssn (688); cvn 68 class reactor fill auxiliary system end item identification, plastic polytetrafluoroethylene overall material

A deformable material which prevents the passage of matter through the joint formed when two faces are joined. It may be metallic or nonmetallic, lubricated or impregnated, solid or hollow cross section. It may be made to any predetermined dimension and shape. Excludes:flat disks, items made of felt material and items having joints. For round metal and plastic items with an aperture and a solid rectangular cross section, see washer, flat; shim; bearing, washer, thrust; and spacer ring. Excludes:disk, valve; seal, nonmetallic angle; seal, nonmetallic channel; seal, nonmetallic special shaped section; shielding gasket, electronic; and ring, sealing jar.