Thumb Screw, Grip Style Smooth, Type Thumb Screw, Finish Zinc-Plated, Material Iron, Thread Size 1/2 In.-13, Fastener Length 3 in, Thread Style Fully Threaded, Thread Length Not Applicable, Head Width 2.25 in, Head Height 1 in, Tensile Strength 50,000 psi, Head Type Wing, Maximum Head Width 2 1/4 in, Minimum Head Width Not Applicable, Maximum Head Height 1 in, Minimum Head Height Not Applicable, System of Measurement Inch, Drive No Drive, Head Material Iron, Head Shape Wing, Package Quantity 25