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 6135-01-066-6904
NSN 5990-01-485-0260
NSN 4140-01-106-4456
NSN 6130-01-660-2611
NSN 6150-01-463-7426
NSN 5999-00-893-8113
NSN 5999-01-149-7270
NSN 6145-00-736-8338
NSN 6240-01-620-5060
NSN 5905-01-429-8810
NSN 6645-01-601-5473
NSN 5925-00-270-6005