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 5920-00-770-2015
NSN 5975-01-143-7753
NSN 5950-01-014-4905
NSN 2925-01-094-4771
NSN 5905-01-422-1070
NSN 5915-01-132-3502
NSN 5950-00-916-4093
NSN 6145-00-702-0057
NSN 6150-00-832-5820
NSN 4140-01-418-7534
NSN 5990-01-004-6343
NSN 6130-01-542-0502