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.
Austria 
Finland 
Spain 
Canada 
Germany 
Netherlands Classification: Gaskets,washers & other seals
NSN 5945-01-246-6737
NSN 6135-01-156-4627
NSN 5975-01-439-1713
NSN 6145-01-621-2227
NSN 5930-01-514-2740
NSN 6145-01-540-7375
NSN 4140-01-261-2966
NSN 5950-01-021-7517
NSN 6320-00-379-4695
NSN 5985-01-504-3651
NSN 6145-00-132-4800
NSN 5985-00-449-6428