Socket Flat Head Screw Head Type Flat System of Measurement Inch Drive Type Socket Drive Size 3/16 in Material Stainless Steel Material Grade/Class 18-8 Finish NL-19 Thread Size 5/16 In.-18 Minimum Thread Length 1 19/64 in Fastener Length 1 1/2 in Head Height 0.198 in Head Diameter 0.656 in Pack Size Small Pack Thread Style Fully Threaded Special Features Not Applicable Dimensional Standards ASME B18.3 Flange Diameter Not Applicable Flange Thickness Not Applicable