Captive Panel Screw, Head Type Round, Finish Plain, Material Stainless Steel, Drive Slotted, Thread Size 1/4 In.-20, Fastener Length 3/4 in, Minimum Thread Length 3/8 in, Head Width 0.563 in, Head Height 0.25 in, Drive Size 1/16 in, Maximum Head Width 9/16 in, Minimum Head Width Not Applicable, Maximum Head Height 1/4 in, Minimum Head Height Not Applicable, System of Measurement Inch, Dimensional Standards RoHS Compliant, Head Style Round, Material Grade/Class 18-8, Overall Length 1 in