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 5975-01-563-7749
NSN 5910-01-567-2570
NSN 5855-01-244-4978
NSN 5920-00-594-3124
NSN 2925-01-325-2490
NSN 5910-00-332-1841
NSN 5996-01-657-0553
NSN 5920-01-194-0350
NSN 6650-01-052-7134
NSN 5996-01-112-7385
NSN 5915-01-215-1183
NSN 6320-00-937-5625