Flange Bolts Dimensional Standards ASME B18.2.1 Drive Hex Drive Size 1/2 in Fastener Length 1 1/2 in Finish Zinc Plated Flange Diameter 1 5/64 in Flange Type Standard Head Height 1/2 in Head Width 3/4 in Manufacturer Location Globally Sourced Material Steel Material Grade/Class Grade 5 Material Quality Standards SAE J429 Minimum Thread Length 1 1/2 in Pack Size Small Pack System of Measurement Inch Tensile Strength 120 000 psi Thread Size 1/2 In.-13 Thread Style Fully Threaded