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 4140-01-481-1971
NSN 5905-01-511-9449
NSN 6645-01-212-9474
NSN 5945-00-661-0506
NSN 6150-01-505-6474
NSN 6650-01-063-7714
NSN 6645-00-300-0401
NSN 6610-01-056-1335
NSN 4140-00-419-0631
NSN 5920-01-040-0425
NSN 5999-00-145-6848
NSN 5945-00-773-3879