A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 5990-00-518-3195
NSN 5999-00-225-4899
NSN 5975-00-041-1426
NSN 5910-01-104-3917
NSN 5930-00-249-0723
NSN 5999-01-658-5058
NSN 5905-01-370-4989
NSN 6610-00-186-9180
NSN 5930-00-554-1064
NSN 5905-01-258-5755
NSN 5996-01-025-8571
NSN 6620-01-515-6269