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 5990-00-928-2261
NSN 5915-00-537-7364
NSN 6240-00-115-8575
NSN 5998-01-452-5273
NSN 6110-00-320-0785
NSN 5950-01-442-6188
NSN 6220-01-367-6411
NSN 6645-00-935-7046
NSN 6645-01-633-1852
NSN 5998-00-673-8570
NSN 7035-00-523-7492
NSN 6620-01-266-5545