Flange Bolts Dimensional Standards ASME B18.2.1 Drive Hex Drive Size 7/16 in Fastener Length 2 1/2 in Finish Black Oxide Flange Diameter 15/16 in Flange Type Standard Head Height 15/32 in Head Width 5/8 in Manufacturer Location Globally Sourced Material Steel Material Grade/Class Grade 8 Material Quality Standards SAE J429 Minimum Thread Length 1 1/8 in Pack Size Small Pack System of Measurement Inch Tensile Strength 150 000 psi Thread Size 7/16 In.-14