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 4140-01-423-0731
NSN 6135-01-286-9563
NSN 6150-01-538-1147
NSN 5965-00-076-9561
NSN 5905-01-359-4788
NSN 4140-00-555-3856
NSN 6685-00-436-7635
NSN 5930-00-947-7288
NSN 2925-00-099-4030
NSN 5920-00-854-8459
NSN 5895-00-727-8708
NSN 6320-01-056-1164