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 5985-01-423-3668
NSN 5998-01-025-6293
NSN 6650-01-605-2302
NSN 6650-01-410-7526
NSN 6150-01-634-0575
NSN 5950-00-385-8906
NSN 6620-01-504-0997
NSN 5990-01-378-7349
NSN 5915-01-512-1327
NSN 5910-00-170-4423
NSN 6130-01-419-2221
NSN 5950-01-228-2202