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.
Italy 
Greece 
Turkey Classification: Gaskets,washers & other seals
NSN 5855-01-391-3819
NSN 5998-00-982-4213
NSN 5920-01-577-0619
NSN 6645-01-063-8243
NSN 5905-01-474-5173
NSN 6645-01-287-5239
NSN 4140-00-677-0430
NSN 5990-01-313-5543
NSN 5895-00-069-2811
NSN 5920-01-274-2055
NSN 5985-01-213-0749
NSN 2925-00-156-8963