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 5975-00-090-9061
NSN 2925-01-058-1718
NSN 4140-01-459-6878
NSN 5945-00-677-7247
NSN 5998-00-350-6071
NSN 5990-01-364-0813
NSN 5975-01-209-9931
NSN 5930-01-117-6975
NSN 5999-01-356-7101
NSN 6620-01-487-7435
NSN 5855-01-482-0440
NSN 4140-01-027-1871