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 4140-00-643-3744
NSN 5910-01-358-5968
NSN 6150-00-683-5349
NSN 5915-01-107-8875
NSN 5990-00-814-9788
NSN 5965-00-303-9701
NSN 4140-01-076-3720
NSN 6645-01-503-6337
NSN 2925-00-070-4576
NSN 5999-00-141-0291
NSN 5930-00-487-5000
NSN 4140-01-507-0471