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 5990-01-526-9941
NSN 5998-01-518-9539
NSN 4140-01-102-7798
NSN 6220-00-205-2040
NSN 6135-00-497-0491
NSN 6645-01-538-0425
NSN 5945-00-338-1387
NSN 6135-01-203-9977
NSN 5905-01-429-1023
NSN 5960-00-478-1168
NSN 6130-00-279-5066
NSN 4140-00-057-1987