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 4140-01-500-3939
NSN 5835-01-293-6453
NSN 6645-01-328-5583
NSN 6110-00-482-3372
NSN 5915-00-562-4390
NSN 6105-01-199-3244
NSN 6240-01-490-2554
NSN 5930-00-110-9397
NSN 6645-00-429-0172
NSN 6135-01-430-3119
NSN 5920-01-517-1158
NSN 5915-01-403-2599