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 6645-01-192-4079
NSN 6650-00-007-4372
NSN 5960-01-503-8411
NSN 4140-01-171-0785
NSN 5925-00-200-9478
NSN 5999-00-208-3797
NSN 6135-00-452-2266
NSN 5855-01-337-0245
NSN 5905-00-948-5762
NSN 5915-01-061-9761
NSN 6240-00-727-8573
NSN 6130-01-481-2649