Irwin Hanson 7726167/7348748 Tap, Die & Drill Sets; Minimum Tap & Die Thread Size (mm): M3x0.50 ; Minimum Tap & Die Thread Size (Inch): #4-40 ; Maximum Tap & Die Thread Size (mm): M12x1.75 ; Maximum Tap & Die Thread Size (Inch): 1/2-20 ; Minimum Dril