Style of packing is antikeystone 2 (stays square, does not bulge up); 5 rings are required to prevent failure of effective sealing
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 5999-01-206-9939
NSN 5925-00-404-9035
NSN 5895-01-033-4729
NSN 5915-00-760-5042
NSN 5975-00-551-3152
NSN 5945-00-681-0371
NSN 5975-01-307-3989
NSN 5960-01-381-2478
NSN 5999-01-102-8192
NSN 5998-01-461-2784
NSN 5920-01-146-4503
NSN 6130-01-017-2831