Socket Head Cap Screw Head Type Standard System of Measurement Inch Drive Type Socket Drive Size 1/4 in Material Stainless Steel Material Grade/Class 18-8 Finish Plain Thread Size 5/16 In.-18 Minimum Thread Length 1 1/8 in Fastener Length 1 1/4 in Head Height 0.312 in Head Diameter 0.469 in Pack Size Small Pack Thread Style Fully Threaded Special Features Not Applicable Color Silver Countersink Angle Not Applicable Dimensional Standards ASME B18.3