Thumb Screw, Type Thumb Screw, Finish Zinc-Plated, Material Steel, Thread Size 5/16-18, Fastener Length 1 in, Thread Length Not Applicable, Head Width 0.7 in, Head Height 0.78 in, Tensile Strength 48, 000 psi, Head Type Spade, Maximum Head Width 45/64 in, Minimum Head Width Not Applicable, Maximum Head Height 25/32 in, Minimum Head Height Not Applicable, System of Measurement Inch, Dimensional Standards ASME B 18.6. 8 2010, Drive Not Applicable, Head Material Steel/Zinc, Head Shape Spade. This item has been restricted from sale in the following state (s): []