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 5965-01-256-9460
NSN 5935-01-028-9618
NSN 6105-00-481-3401
NSN 5998-01-290-4895
NSN 6150-01-503-7920
NSN 6150-01-631-8398
NSN 5990-01-365-6016
NSN 5999-00-274-6294
NSN 5925-01-603-8721
NSN 5985-01-296-2231
NSN 5960-00-998-4324
NSN 5996-01-592-3011