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 2925-01-508-4138
NSN 2925-01-538-1343
NSN 5935-01-374-9390
NSN 6320-01-610-3821
NSN 6650-00-259-2605
NSN 6650-00-479-9329
NSN 5935-01-314-7763
NSN 5920-00-539-5463
NSN 5950-00-967-4246
NSN 5895-01-437-6572
NSN 5925-01-628-4934
NSN 5990-01-553-1094