Thumb Screw, Grip Style Knurled, Type Thumb Screw, Finish Black Oxide, Material Steel, Thread Size 1/4 In. -20, Fastener Length 1 1/2 in, Thread Style Fully Threaded, Thread Length Not Applicable, Head Width 0.688 in, Head Height 0.219 in, Tensile Strength 57, 000 psi, Head Type Cheese, Maximum Head Width 11/16 in, Minimum Head Width Not Applicable, Maximum Head Height 7/32 in, Minimum Head Height Not Applicable, System of Measurement Inch, Drive No Drive. This item has been restricted from sale in the following state (s): []