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 6150-01-120-2129
NSN 5975-01-627-6534
NSN 5930-01-207-1878
NSN 5950-01-266-1406
NSN 5920-00-369-0923
NSN 5960-00-422-3197
NSN 5935-01-048-4906
NSN 6240-00-866-6239
NSN 6135-00-998-5884
NSN 6240-01-608-4990
NSN 6645-01-258-5558
NSN 6685-00-473-2423