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 6240-01-145-4916
NSN 6240-01-189-9339
NSN 5990-01-331-9438
NSN 6130-01-150-0156
NSN 5960-01-155-6839
NSN 6220-01-388-0823
NSN 5985-01-576-9593
NSN 7035-00-997-6212
NSN 6320-01-459-6992
NSN 5975-01-026-2427
NSN 5910-01-484-6509
NSN 2925-01-109-1518