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 4140-00-087-4611
NSN 5990-01-331-9438
NSN 5920-01-464-0091
NSN 5960-01-437-5318
NSN 5965-00-612-0072
NSN 5945-00-286-8594
NSN 5930-01-620-5636
NSN 6135-00-911-9321
NSN 5998-01-458-2341
NSN 5999-01-143-0308
NSN 6130-00-226-9424
NSN 6130-00-531-6564