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 6645-01-520-6563
NSN 6320-01-516-3836
NSN 6650-01-125-4989
NSN 5935-00-081-0540
NSN 6620-00-498-7781
NSN 5920-00-770-2015
NSN 6145-01-498-9557
NSN 5895-01-517-5150
NSN 7035-01-188-1395
NSN 6650-00-287-5868
NSN 5935-00-639-1382
NSN 6650-01-546-6611