Socket Flat Head Screw, Head Type Flat, System of Measurement Inch, Drive Type Socket, Drive Size 1/20 in, Material Steel, Finish Black Oxide, Thread Size #1-72, Minimum Thread Length 1/4 in, Fastener Length 1/4 in, Head Height 0.054 in, Head Diameter 0.168 in, Pack Size Small Pack, Thread Style Fully Threaded, Special Features Not Applicable, Countersink Angle 82 Degrees , Dimensional Standards ASME B18.3, Flange Diameter Not Applicable, Flange Thickness Not Applicable