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 5990-01-376-8930
NSN 6220-00-258-2967
NSN 6620-01-538-7174
NSN 4140-00-937-8117
NSN 6105-01-011-5210
NSN 6240-01-530-0438
NSN 5835-01-381-9565
NSN 5945-00-517-9566
NSN 6240-01-005-3456
NSN 6320-00-336-9123
NSN 6685-01-468-5009
NSN 7035-01-633-9537