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 2925-01-633-4048
NSN 5915-01-368-5668
NSN 5915-00-242-4292
NSN 5950-01-523-2479
NSN 5960-00-813-2518
NSN 5910-00-421-1007
NSN 5996-00-205-2933
NSN 5920-01-157-2767
NSN 5990-00-506-8315
NSN 6130-01-415-1161
NSN 6650-01-330-4857
NSN 6105-01-237-2507