Allen Nut System of Measurement Inch Insert Diameter 3/16 in Overall Length 11/64 in Installed Length Not Applicable Thread Size #4-40 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 13/64 in Maximum Hole Diameter 0.202 in Minimum Material Thickness 0.179 in