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 2925-01-143-0092
NSN 6145-01-101-9539
NSN 5945-01-214-4136
NSN 5915-00-495-7130
NSN 6135-01-217-8810
NSN 5960-01-116-2092
NSN 6105-01-454-4736
NSN 5975-00-419-3256
NSN 6650-00-382-6080
NSN 5835-00-670-2925
NSN 6135-01-487-6275
NSN 6240-01-563-0096