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 6645-01-526-5989
NSN 6620-01-327-3011
NSN 5975-01-616-8923
NSN 6150-01-632-1797
NSN 5915-01-020-6509
NSN 5960-01-141-6489
NSN 5950-00-498-0553
NSN 5999-01-084-6266
NSN 5990-01-004-6343
NSN 5990-01-234-0789
NSN 4140-01-175-0098
NSN 5935-01-552-0950