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 5990-01-027-0568
NSN 5960-01-173-5639
NSN 6240-00-485-3128
NSN 6135-01-321-1373
NSN 6645-00-602-5968
NSN 6105-01-104-0981
NSN 5925-00-940-8088
NSN 6620-01-032-3937
NSN 5920-01-615-4604
NSN 4140-01-571-7913
NSN 6620-00-038-5343
NSN 5910-01-221-5505