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 2925-01-073-8223
NSN 5999-00-955-2128
NSN 5996-01-485-0305
NSN 5895-01-029-1775
NSN 5996-00-187-8072
NSN 5990-01-057-4191
NSN 6220-01-318-3076
NSN 5905-01-448-6718
NSN 6240-01-398-1891
NSN 5915-00-215-2721
NSN 5915-01-365-5771
NSN 4140-01-453-4744