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 5910-01-181-6650
NSN 5998-00-730-8237
NSN 5965-01-331-5431
NSN 5960-01-271-0928
NSN 7035-01-660-5981
NSN 5945-01-257-0155
NSN 5950-01-207-7971
NSN 6135-00-990-1822
NSN 4140-01-444-9815
NSN 5945-00-299-8295
NSN 5920-00-136-9459
NSN 5999-01-394-5186