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 5990-01-061-5618
NSN 7035-01-576-9171
NSN 6220-00-904-0156
NSN 6220-00-609-3343
NSN 6130-00-409-9073
NSN 2925-01-011-8732
NSN 5835-00-477-3162
NSN 6645-01-514-7901
NSN 5930-00-456-0889
NSN 5945-01-259-6383
NSN 2925-00-063-5898
NSN 5920-01-420-3753