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 6685-01-462-1770
NSN 5935-00-816-1850
NSN 5905-01-307-9284
NSN 6220-01-227-1917
NSN 5996-01-579-2986
NSN 5910-01-469-0151
NSN 6685-01-516-7535
NSN 2925-01-277-5882
NSN 5960-01-192-7710
NSN 5855-01-517-7325
NSN 6620-00-464-6105
NSN 6650-01-510-9488