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 5935-00-212-7920
NSN 5999-01-348-2186
NSN 5930-01-369-8382
NSN 6650-00-641-3209
NSN 4140-00-981-5474
NSN 6320-01-422-1212
NSN 5990-01-395-4194
NSN 6105-00-950-2311
NSN 6650-01-492-7809
NSN 5965-01-265-6814
NSN 5998-01-212-3124
NSN 4140-00-585-6229