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 5990-00-917-4220
NSN 6620-01-540-3440
NSN 5835-01-550-5094
NSN 5905-01-244-3970
NSN 6645-00-736-0476
NSN 6145-01-530-7171
NSN 4140-01-424-0841
NSN 6150-00-326-6803
NSN 6220-00-111-7756
NSN 5990-01-188-7309
NSN 2925-00-115-5857
NSN 4140-01-522-0269