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 5915-01-090-3191
NSN 6620-00-400-1099
NSN 5960-01-368-4620
NSN 6650-01-237-4047
NSN 6135-01-458-3851
NSN 6320-01-029-4220
NSN 5910-00-474-5762
NSN 5990-01-045-7754
NSN 5965-00-642-9879
NSN 5996-00-083-0346
NSN 6145-01-272-3365
NSN 5835-01-184-6878