O-ring cross-sectional shape style, -65.0 deg fahrenheit and 160.0 deg fahrenheit temp rating, 0.135 inches minimum and 0.143 inches maximum cross-sectional height, 8.454 inches minimum and 8.514 inches maximum center hole diameter, 65.0 shore durometer a minimum and 71.0 shore durometer a maximum overall hardness rating, rubber butadiene-acrylonitrile class nbr overall material

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.