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 6620-01-432-7032
NSN 6645-00-838-6939
NSN 6150-01-140-3798
NSN 5960-00-794-7463
NSN 5905-00-035-8981
NSN 5920-01-021-5198
NSN 5925-01-370-6972
NSN 6685-01-628-1738
NSN 6135-01-167-7604
NSN 6650-01-474-7933
NSN 5920-01-464-4622
NSN 5930-00-923-4630