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 5990-00-401-6793
NSN 6145-00-081-1073
NSN 6220-01-642-6424
NSN 5999-00-229-1361
NSN 5990-01-384-2697
NSN 6135-01-523-3198
NSN 6220-01-577-9790
NSN 5855-01-418-6303
NSN 5960-01-413-3877
NSN 6650-01-122-0169
NSN 6220-01-146-5152
NSN 6650-00-170-5095