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 6150-01-571-7980
NSN 6135-00-351-8606
NSN 5920-01-129-0895
NSN 6240-01-409-2465
NSN 5915-01-462-0432
NSN 5935-01-193-5995
NSN 6620-01-467-2111
NSN 5835-01-384-3206
NSN 5996-01-185-5411
NSN 5960-00-529-2704
NSN 2925-01-221-1191
NSN 5935-01-512-2094