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 4140-01-594-6862
NSN 5910-00-202-1056
NSN 4140-00-239-9174
NSN 6130-00-662-8557
NSN 2925-00-149-0760
NSN 6105-01-154-8232
NSN 5835-01-442-6482
NSN 5998-01-188-7555
NSN 5910-01-420-7141
NSN 5990-01-099-8574
NSN 6610-01-041-0165
NSN 5925-01-334-0139