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 5950-01-482-6338
NSN 5920-00-779-0827
NSN 7035-00-574-4223
NSN 6220-00-764-0404
NSN 2925-01-408-2088
NSN 6320-01-021-6633
NSN 6685-01-168-8194
NSN 6610-00-186-9180
NSN 5975-01-432-2591
NSN 6240-01-023-7720
NSN 5935-01-441-9298
NSN 6110-01-344-4533