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 5990-01-145-2878
NSN 5985-00-708-2193
NSN 6130-01-514-8081
NSN 4140-01-432-0855
NSN 4140-01-476-7871
NSN 6620-01-512-3032
NSN 5945-01-377-4499
NSN 6135-00-437-5182
NSN 5975-00-170-3623
NSN 4140-01-399-0330
NSN 5996-00-136-9651
NSN 5990-01-503-9804