Allen Nut System of Measurement Inch Insert Diameter 9/32 in Overall Length 17/64 in Installed Length Not Applicable Thread Size M4-0.70 Thread Direction Right Hand Thread Type Coarse Flange Diameter Not Applicable Flange Thickness Not Applicable Material Stainless Steel Material Grade/Class 18-8 Finish Plain Body Texture Knurled Compatible Material Metal Drill Bit Size 19/64 in Maximum Hole Diameter 0.298 in Minimum Material Thickness 0.273 in