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 
Spain 
Canada 
France 
Germany 
Netherlands 
Greece Classification: Gaskets,washers & other seals
NSN 6105-00-840-6433
NSN 2925-01-474-3363
NSN 5895-01-503-3396
NSN 6130-01-189-0229
NSN 6135-00-412-1687
NSN 5905-01-121-4264
NSN 6130-01-298-9913
NSN 6320-01-190-1397
NSN 4140-01-448-6743
NSN 5915-01-100-3652
NSN 5925-01-263-3846
NSN 5975-01-116-4472