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 6620-00-186-8220
NSN 5925-01-255-7368
NSN 6240-01-260-3418
NSN 5905-01-523-4952
NSN 5930-00-021-3707
NSN 5990-01-633-9503
NSN 5945-01-446-0954
NSN 6105-01-135-3912
NSN 6145-00-233-9146
NSN 5925-00-660-7589
NSN 6685-00-542-0924
NSN 5996-01-188-3831