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.
Dept. of the Air Force 
Dept. of the Navy 
Slovenia 
Australia 
France 
Greece Classification: Gaskets,washers & other seals
NSN 6620-00-006-6418
NSN 5920-00-848-0264
NSN 6320-00-937-5625
NSN 6110-01-529-0123
NSN 6220-01-443-8955
NSN 5965-00-196-7320
NSN 6620-01-183-0740
NSN 5930-01-580-0357
NSN 5999-01-314-6635
NSN 6150-01-605-6866
NSN 5950-00-695-0524
NSN 5996-01-124-0781