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 4140-00-554-4050
NSN 5985-01-133-6719
NSN 5965-01-186-2051
NSN 5996-01-472-2112
NSN 5920-01-470-1925
NSN 2925-01-004-5627
NSN 6105-01-386-1529
NSN 5915-00-025-1763
NSN 6650-00-891-9850
NSN 2925-01-053-5697
NSN 6220-01-381-1793
NSN 5985-01-209-9164