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 6150-00-836-6466
NSN 4140-01-474-4900
NSN 6110-01-461-3612
NSN 5999-00-468-7992
NSN 6130-01-214-4434
NSN 6220-01-025-4535
NSN 6130-01-556-0211
NSN 6240-00-523-9861
NSN 6145-01-519-1127
NSN 5975-01-227-5543
NSN 5998-01-546-6138
NSN 6220-01-537-1590