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 6150-01-383-1903
NSN 5990-00-827-0684
NSN 5925-01-279-4140
NSN 5950-01-417-3119
NSN 5935-01-076-3660
NSN 5960-01-219-5504
NSN 5925-00-788-0368
NSN 5990-01-064-9994
NSN 5915-01-117-5888
NSN 5945-01-222-7454
NSN 6685-00-489-5377
NSN 6105-01-180-5013