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 5925-01-408-6577
NSN 5990-01-628-8188
NSN 5930-01-065-0890
NSN 5930-00-781-7149
NSN 5905-00-683-2759
NSN 5835-00-827-1904
NSN 5999-01-196-5273
NSN 5915-01-489-0372
NSN 5950-01-534-4840
NSN 5915-01-308-0957
NSN 5910-01-283-8122
NSN 6220-00-171-8638