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 4140-01-456-0839
NSN 5855-01-411-3360
NSN 2925-00-278-9468
NSN 6650-01-497-5782
NSN 5895-00-280-7528
NSN 5985-01-223-2188
NSN 6110-00-072-9394
NSN 6240-01-538-3727
NSN 5855-01-273-0927
NSN 6130-01-099-4950
NSN 6645-01-082-0518
NSN 5930-01-506-7389