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 6145-00-786-1172
NSN 6240-00-403-4861
NSN 6685-00-966-1596
NSN 5930-00-255-4173
NSN 5990-01-338-9697
NSN 7035-01-256-9598
NSN 5835-00-813-1724
NSN 6220-01-285-5180
NSN 6220-00-500-4813
NSN 5950-01-004-0441
NSN 5975-00-151-4097
NSN 6135-01-014-3144