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 6135-01-468-6491
NSN 5855-00-198-3197
NSN 5965-01-095-9767
NSN 5965-01-459-5493
NSN 7035-00-406-0568
NSN 5998-01-575-1775
NSN 5965-00-947-2310
NSN 6685-00-808-1984
NSN 5990-01-069-8649
NSN 5905-00-099-9995
NSN 5990-00-234-9136
NSN 6620-01-030-0525