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 5835-00-427-2772
NSN 6240-00-958-9831
NSN 6150-00-165-5816
NSN 5930-01-117-7287
NSN 6620-01-605-2590
NSN 5910-01-470-8625
NSN 6320-00-025-9910
NSN 4140-00-186-3062
NSN 5905-00-958-5008
NSN 6145-00-955-1993
NSN 5990-01-390-2177
NSN 5855-00-198-3197