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 6645-00-144-4868
NSN 7035-01-561-6331
NSN 5985-01-293-8498
NSN 6150-01-128-4487
NSN 5905-01-162-4702
NSN 5905-01-525-8160
NSN 5945-00-996-0531
NSN 5915-01-188-6665
NSN 5998-00-334-0386
NSN 6105-00-467-5283
NSN 5990-01-184-2550
NSN 6220-01-532-3903