Thumb Screw Grip Style Knurled Type Thumb Screw Finish Plain Material 18-8 Stainless Steel Thread Size #4-40 Fastener Length 1/2 in Head Width 0.5 in Head Height 0.5 in Tensile Strength 80 000 psi Head Type Knurled Maximum Head Height 0.5 in System of Measurement Inch Drive Slotted Drive Size 3/64 in Head Material 18-8 Stainless Steel Package Quantity 5