Socket Flat Head Screw, Head Type Flat, System of Measurement Inch, Drive Type Socket, Drive Size 1/16 in, Material Steel, Finish Zinc Plated, Thread Size 1/4 In.-20, Minimum Thread Length 13/32 in, Fastener Length 13/32 in, Head Height 0.093 in, Head Diameter 0.25 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