Socket Head Cap Screw, Head Type Flanged Standard, System of Measurement Inch, Drive Type Socket, Drive Size 3/8 in, Material Aluminum, Material Grade/Class Not Graded, Finish Plain, Thread Size 1/2 In.-13, Minimum Thread Length 3/4 in, Fastener Length 3 5/8 in, Head Height 0.562 in, Head Diameter 0.75 in, Pack Size Small Pack, Thread Style Partially Threaded, Special Features Not Applicable, Countersink Angle Not Applicable, Dimensional Standards AMPG 2013 ZPS.01, Flange Diameter 1 1/16 in