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 6150-01-547-9171
NSN 5990-00-518-0684
NSN 4140-01-445-6543
NSN 5990-01-004-6343
NSN 4140-01-457-8583
NSN 6650-00-987-5070
NSN 5920-01-385-2487
NSN 6110-00-081-0927
NSN 6105-01-069-9190
NSN 5935-01-519-1808
NSN 6320-01-173-7950
NSN 5990-00-153-0055