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 5920-01-168-7810
NSN 6645-00-972-5239
NSN 6240-01-459-7827
NSN 5915-01-073-6753
NSN 5905-00-721-2973
NSN 7035-00-155-9513
NSN 5935-01-390-4968
NSN 6320-01-116-3980
NSN 5996-00-820-4072
NSN 4140-01-367-2820
NSN 7035-01-193-2667
NSN 4140-01-522-1671