012520B050 Machine Screw, Head Type Binding, Material Nylon, Finish Plain, Drive Slotted, Thread Size 1/4 In.-20, Fastener Length 1/2 in, Head Width 0.516 in, Head Height 0.156 in, Tensile Strength 312 psi, Pack Size Small, Minimum Thread Length 1/2 in, Type Standard Machine Screw, Washer Outside Diameter Not Applicable, Washer Thickness Not Applicable, Maximum Head Width 0.516 in, Minimum Head Width 0.512 in, Maximum Head Height 0.156 in, Minimum Head Height 0.159 in, System of Measurement Inch