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 5920-00-929-5963
NSN 5925-01-366-6001
NSN 5960-00-034-7925
NSN 4140-01-030-5769
NSN 5925-01-411-1240
NSN 6650-00-171-4175
NSN 5998-01-230-2335
NSN 6620-00-522-4815
NSN 5895-01-226-0329
NSN 5975-00-082-0894
NSN 5910-01-456-1591
NSN 5990-00-104-4903