Allen Nut System of Measurement Inch Insert Diameter 19/32 in Overall Length 5/8 in Installed Length Not Applicable Thread Size M10-1.50 Thread Direction Right Hand Thread Type Coarse Flange Diameter Not Applicable Flange Thickness Not Applicable Material Steel Material Grade/Class Grade 2H Finish Black Oxide Body Texture Knurled Compatible Material Metal Drill Bit Size 39/64 in Maximum Hole Diameter 0.61 in Minimum Material Thickness 0.621 in