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 5920-00-974-4381
NSN 6130-01-587-7930
NSN 5920-01-418-1821
NSN 6150-01-426-8043
NSN 4140-01-071-6191
NSN 6320-01-371-3047
NSN 6240-00-404-7288
NSN 6145-00-496-2020
NSN 6145-01-171-0719
NSN 6620-01-431-0706
NSN 5945-01-485-2402
NSN 5998-01-139-0351