Allen Nut System of Measurement Inch Insert Diameter 3/16 in Overall Length 11/64 in Installed Length Not Applicable Thread Size M3-0.50 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 13/64 in Maximum Hole Diameter 0.202 in Minimum Material Thickness 0.179 in