Thumb Screw Grip Style Smooth Type Thumb Screw Finish Plain Material Iron Thread Size 3/8 In.-16 Fastener Length 3 in Thread Style Fully Threaded Thread Length 3 in Head Width 1.438 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