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.
Classification: Gaskets,washers & other seals
NSN 4140-01-121-2182
NSN 5935-01-132-3127
NSN 5985-01-032-4061
NSN 5975-01-541-5283
NSN 5915-00-302-9393
NSN 6130-01-112-0158
NSN 5910-01-517-9644
NSN 2925-00-201-8247
NSN 5950-00-857-3262
NSN 5975-00-290-4285
NSN 5985-01-567-3322
NSN 4140-01-087-0359