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 4140-01-438-9939
NSN 5996-00-661-1151
NSN 5915-00-216-8185
NSN 6685-01-411-5286
NSN 5920-01-564-2682
NSN 4140-01-514-0934
NSN 6110-00-878-1414
NSN 5855-00-862-3345
NSN 6610-01-294-5666
NSN 5920-00-930-1212
NSN 7035-01-180-8256
NSN 6320-01-618-7800