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 4140-01-470-0542
NSN 4140-00-224-5533
NSN 5950-01-151-4209
NSN 5895-01-141-6031
NSN 5945-01-328-7929
NSN 5855-01-440-9880
NSN 5975-00-921-4894
NSN 5835-01-193-3175
NSN 6645-01-083-4759
NSN 7035-01-252-1539
NSN 5998-01-055-4170
NSN 5935-00-853-6838