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 5960-01-167-2137
NSN 6145-01-558-9942
NSN 6220-01-107-2613
NSN 5999-01-532-1856
NSN 5950-01-141-2317
NSN 5999-01-357-7817
NSN 5930-00-851-8805
NSN 4140-01-430-6947
NSN 5915-01-055-9248
NSN 5895-01-421-4487
NSN 6145-00-605-8508
NSN 6685-01-208-1033