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 5910-01-222-3588
NSN 5999-01-227-2526
NSN 5999-01-336-0333
NSN 5920-01-445-5701
NSN 5920-00-875-6823
NSN 6220-01-436-3850
NSN 5965-00-471-5018
NSN 5935-01-010-0491
NSN 5965-01-422-1392
NSN 5930-01-441-4689
NSN 6610-01-020-0586
NSN 4140-01-521-0305