Thumb Screw Grip Style Smooth Type Thumb Screw Finish Plain Material Iron Thread Size 1/2 In.-13 Fastener Length 2 1/2 in Thread Style Fully Threaded Thread Length 2 1/2 in Head Width 2.25 in Head Height 1 in Tensile Strength 50 000 psi Head Type Wing Maximum Head Height 1 in System of Measurement Inch Head Material Iron Head Shape Wing Package Quantity 25