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 6650-01-434-6434
NSN 5920-01-600-5847
NSN 6130-01-512-1710
NSN 5935-00-914-2881
NSN 4140-01-485-5351
NSN 6135-01-286-9563
NSN 5960-01-342-9965
NSN 6110-00-774-1792
NSN 6645-01-302-6243
NSN 6610-01-445-7120
NSN 5920-00-518-0839
NSN 5925-00-231-8668