Thumb Screw Grip Style Knurled Type Thumb Screw Finish Black Oxide Material Steel Thread Size 1/2 In.-13 Fastener Length 3/4 in Thread Style Fully Threaded Thread Length 3/4 in Head Width 1 in Head Height 1 in Tensile Strength 57 000 psi Head Type Knurled Maximum Head Height 1 in System of Measurement Inch Features Diamond Knurl For Use in Systems Jig and Fixture Component Head Material Steel Head Shape Round