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 5905-00-538-5803
NSN 5996-01-055-2253
NSN 5999-00-548-7722
NSN 6620-01-032-3937
NSN 4140-01-528-7945
NSN 5935-01-469-6030
NSN 5965-01-537-3238
NSN 6145-01-381-5589
NSN 6685-00-571-9281
NSN 5945-00-661-0506
NSN 6320-01-493-4472
NSN 6610-01-593-4643