Thumb Screw, Grip Style Knurled, Type Thumb Screw, Finish Plain, Material 18-8 Stainless Steel, Thread Size M4-0.70, Fastener Length 9 mm, Head Width 5 mm, Head Height 5 mm, Tensile Strength 80,000 psi, Head Type Knurled, System of Measurement Metric, Head Material 18-8 Stainless Steel, Package Quantity 5.