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 4140-01-264-4952
NSN 5835-01-381-9565
NSN 5990-01-199-4832
NSN 5990-01-242-4493
NSN 6610-00-160-3315
NSN 5998-01-303-6218
NSN 6650-00-035-9297
NSN 6320-01-339-9974
NSN 6130-01-564-8472
NSN 5925-00-034-1293
NSN 6150-01-429-8189
NSN 5895-00-650-4778