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.
Brazil 
Spain 
Singapore 
France 
Republic of Korea 
Italy 
Greece 
Turkey Classification: Gaskets,washers & other seals
NSN 6105-01-004-1010
NSN 5895-00-100-4311
NSN 5920-01-589-2844
NSN 6220-01-485-6385
NSN 5960-00-285-1001
NSN 6240-01-269-7276
NSN 6610-00-583-1084
NSN 6645-01-223-2402
NSN 5895-01-583-5744
NSN 6135-01-054-2462
NSN 6110-01-242-8363
NSN 7035-01-086-1828