Irwin® Hanson® Hex Threading Die, Metric, M3x0.5 Thread, 3/8 in Thickness, 1.137 in OD Die, 1 in Hex, Right Hand Thread, High Carbon Steel Irwin® Hanson® 6612ZR Hex Threading Die, M3x0.5 Thread, 3/8 in Thick, 1.137 in OD Die, High Carbon Steel