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 5990-01-362-4011
NSN 5985-00-070-5722
NSN 5960-01-122-7310
NSN 6105-01-245-8932
NSN 5960-00-915-6269
NSN 5945-01-574-3972
NSN 6150-01-519-8723
NSN 5930-00-218-1031
NSN 6145-01-005-2382
NSN 5915-01-613-9427
NSN 6620-01-201-6080
NSN 5998-01-645-1895