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 5990-00-902-7764
NSN 6105-01-555-8232
NSN 6105-00-438-5039
NSN 6145-01-593-9165
NSN 6150-01-037-5528
NSN 6240-01-126-9167
NSN 5990-01-127-1108
NSN 5920-01-509-8182
NSN 6320-01-313-2709
NSN 5925-01-385-9384
NSN 5998-01-064-9630
NSN 5855-00-149-0766