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 6320-01-443-3826
NSN 5895-00-510-6431
NSN 4140-01-417-5404
NSN 5960-01-512-0233
NSN 2925-01-429-2235
NSN 6620-00-140-8644
NSN 5920-01-067-2289
NSN 5930-01-428-9269
NSN 5925-00-192-9630
NSN 5835-01-219-0586
NSN 5996-00-313-9180
NSN 6620-00-516-3204