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 5985-01-381-1201
NSN 6145-01-173-1389
NSN 6620-01-417-8110
NSN 5960-00-402-7563
NSN 6650-00-339-5458
NSN 6105-00-686-5995
NSN 5920-01-561-7212
NSN 4140-00-018-2198
NSN 4140-01-342-7929
NSN 5925-00-493-0981
NSN 5985-01-023-1568
NSN 2925-00-321-2032