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 5985-01-432-0860
NSN 6135-01-098-3020
NSN 6220-01-030-2697
NSN 6620-01-288-8249
NSN 6320-01-388-1067
NSN 6150-01-154-3579
NSN 5855-00-944-0949
NSN 6150-00-732-8038
NSN 5855-00-832-9341
NSN 4140-01-420-0354
NSN 6110-00-976-3361
NSN 4140-01-481-7019