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 5930-00-526-7645
NSN 2925-00-390-7546
NSN 2925-00-395-8751
NSN 6650-00-896-2250
NSN 6610-00-676-1741
NSN 5998-00-114-5269
NSN 5910-00-858-1230
NSN 5975-00-661-1832
NSN 6620-00-875-6572
NSN 6650-01-531-1196
NSN 6685-01-562-5603
NSN 5835-01-323-2581