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 2925-00-163-1848
NSN 5965-00-617-5731
NSN 6620-01-406-6840
NSN 6220-01-419-1932
NSN 6150-01-332-6832
NSN 6150-01-200-7176
NSN 6130-00-959-5800
NSN 5985-01-033-1774
NSN 5920-00-820-4301
NSN 5998-00-879-4650
NSN 4140-01-392-8068
NSN 5996-00-493-3468