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 5990-00-155-2306
NSN 5990-01-481-5274
NSN 7035-00-549-2722
NSN 5975-01-513-0032
NSN 6620-00-041-3406
NSN 6145-01-024-5572
NSN 5945-01-377-2415
NSN 4140-01-649-8798
NSN 6610-00-186-9180
NSN 5930-00-079-6586
NSN 6150-00-633-7160
NSN 5855-01-534-3724