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 5910-00-010-3882
NSN 5998-00-709-0613
NSN 5835-00-275-0584
NSN 5985-01-160-7140
NSN 6105-01-381-1088
NSN 6610-01-550-2368
NSN 5915-00-261-9970
NSN 6650-00-955-0568
NSN 5835-00-632-8621
NSN 6145-00-426-5124
NSN 4140-00-287-9199
NSN 5920-00-240-6394