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 5950-01-428-7776
NSN 5996-01-541-4974
NSN 6620-00-112-1214
NSN 5975-00-738-0211
NSN 5925-00-142-0752
NSN 4140-01-323-3661
NSN 5855-01-350-5540
NSN 5998-00-568-3973
NSN 5990-00-847-6957
NSN 5945-01-567-4244
NSN 5945-01-408-4272
NSN 6320-00-937-5625