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 6105-01-471-8085
NSN 2925-00-257-2872
NSN 5990-01-239-1474
NSN 5945-00-308-0979
NSN 5905-00-354-9408
NSN 5925-00-917-0546
NSN 5960-00-140-9583
NSN 6150-01-109-5423
NSN 5910-01-612-7198
NSN 5930-01-521-3287
NSN 5835-00-583-1316
NSN 6240-00-079-0112