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 4140-00-370-2612
NSN 6685-01-499-6864
NSN 5999-01-437-8843
NSN 5905-01-170-4111
NSN 4140-00-145-7334
NSN 4140-01-112-1729
NSN 2925-01-616-3037
NSN 6220-01-532-3423
NSN 5855-00-688-9954
NSN 5905-00-064-5049
NSN 5905-01-145-3031
NSN 5975-01-534-3769