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 6240-01-316-9882
NSN 6610-01-400-3880
NSN 6150-01-139-2716
NSN 6645-00-641-3202
NSN 5910-01-298-7887
NSN 4140-01-337-0495
NSN 6320-00-809-5744
NSN 6645-01-388-0391
NSN 6135-00-660-8654
NSN 5965-00-918-3950
NSN 6145-01-519-2087
NSN 6135-00-209-6918