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 5975-01-384-5654
NSN 5990-01-045-7754
NSN 6620-01-629-4045
NSN 6650-01-414-8810
NSN 5895-00-919-0684
NSN 6150-01-378-6065
NSN 5990-00-197-0159
NSN 4140-01-389-8850
NSN 5975-01-595-8898
NSN 6150-00-020-4079
NSN 5930-01-607-6934
NSN 6135-01-090-5365