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 5935-01-158-4793
NSN 5975-01-573-5280
NSN 4140-01-118-8918
NSN 7035-01-495-5063
NSN 5915-00-163-2156
NSN 5920-00-781-9317
NSN 5985-00-117-4170
NSN 6620-01-221-7784
NSN 5945-00-653-3776
NSN 5895-01-468-6215
NSN 6105-01-471-8085
NSN 6240-01-034-0436