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 6220-01-525-4975
NSN 5965-00-900-6401
NSN 6110-00-951-9824
NSN 5990-01-582-1977
NSN 5855-01-070-8084
NSN 6130-01-449-1868
NSN 6240-01-461-2123
NSN 5990-01-529-7307
NSN 5915-00-045-3441
NSN 4140-01-020-1116
NSN 6105-01-358-2081
NSN 6110-00-816-9715