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 6130-00-022-0596
NSN 6105-00-400-7251
NSN 5855-01-468-1431
NSN 5996-01-055-6572
NSN 6150-01-182-7489
NSN 4140-01-309-5411
NSN 5990-01-052-0099
NSN 5975-00-358-7916
NSN 6130-01-391-1993
NSN 6220-01-394-9792
NSN 5925-00-627-2011
NSN 6645-00-736-0476