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 6220-01-239-5532
NSN 5905-01-581-1060
NSN 5905-00-966-9747
NSN 5835-00-864-0694
NSN 5920-01-169-7888
NSN 6685-01-032-3384
NSN 5945-01-092-8098
NSN 5990-01-516-9665
NSN 5960-00-597-2680
NSN 4140-01-137-5936
NSN 5855-01-159-1654
NSN 5855-01-067-7807