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 4140-00-857-9970
NSN 5990-00-594-7291
NSN 5835-00-583-1316
NSN 6105-01-102-2432
NSN 6220-00-967-0062
NSN 6130-01-104-3811
NSN 6240-00-578-7422
NSN 4140-00-398-8544
NSN 6135-00-016-0071
NSN 2925-01-464-2535
NSN 5930-00-832-1478
NSN 5996-01-006-2324