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 4140-01-044-3366
NSN 5985-01-492-5943
NSN 5960-00-895-0542
NSN 5990-01-100-1840
NSN 5905-00-611-2107
NSN 5855-01-378-9048
NSN 6645-01-021-5727
NSN 6620-01-508-1996
NSN 5835-01-027-3931
NSN 5985-00-161-8907
NSN 5990-00-956-9130
NSN 6150-01-028-7961