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.
NSN 5999-00-079-1911
NSN 4140-01-599-8434
NSN 6240-01-286-3200
NSN 4140-00-517-7902
NSN 6610-01-318-1840
NSN 6620-00-764-9570
NSN 6620-01-364-7461
NSN 6145-00-467-6433
NSN 6645-00-192-1152
NSN 5930-01-599-1463
NSN 6645-00-385-3684
NSN 6220-00-169-6516