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 5996-01-421-4761
NSN 5905-00-679-9550
NSN 5925-01-319-6738
NSN 6220-00-125-3805
NSN 4140-01-382-7965
NSN 5930-00-840-8125
NSN 5920-01-028-1287
NSN 5915-00-532-1055
NSN 6240-01-535-7359
NSN 5975-00-122-1553
NSN 4140-01-201-4359
NSN 6685-00-388-6763