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.
NSN 6610-00-618-0772
NSN 2925-01-633-0225
NSN 5990-00-113-2653
NSN 6220-01-127-2125
NSN 5915-01-542-9037
NSN 5855-00-361-0167
NSN 5905-00-201-0513
NSN 5999-01-500-2107
NSN 5895-01-365-9788
NSN 5990-00-003-0569
NSN 4140-00-907-0775
NSN 6320-01-125-3361