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 5990-01-485-0260
NSN 6320-01-259-2604
NSN 6610-01-200-3596
NSN 6685-01-607-1192
NSN 6645-01-241-4300
NSN 6645-00-279-1777
NSN 5935-00-189-2572
NSN 5915-00-096-7330
NSN 6610-01-649-5326
NSN 5950-01-442-4140
NSN 5999-01-061-9771
NSN 5920-01-317-3506