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 5920-01-372-1322
NSN 5925-01-395-1971
NSN 6650-00-809-1817
NSN 5920-01-206-0191
NSN 5930-01-294-3711
NSN 5920-00-757-1900
NSN 6650-01-414-9784
NSN 6110-01-079-2235
NSN 5998-01-435-4817
NSN 5950-01-581-6612
NSN 5960-01-350-2925
NSN 6145-01-145-5177