Flange Bolts Dimensional Standards ASME B18.2.1 Drive Hex Drive Size 3/4 in Fastener Length 3 1/2 in Finish Black Oxide Flange Diameter 1 19/32 in Flange Type Standard Head Height 47/64 in Head Width 1 1/8 in Manufacturer Location Globally Sourced Material Steel Material Grade/Class Grade 8 Material Quality Standards SAE J429 Minimum Thread Length 1 3/4 in Pack Size Small Pack System of Measurement Inch Tensile Strength 150 000 psi Thread Size 3/4 In.-10