Harvey Tool 987103 | 0.5800" Diameter x 1.8750" (1-7/8) LOC x 0.6250" (5/8) Shank x 4 Flute Uncoated Carbide Multi-Form Thread Milling CutterThread Milling Cutters Multi Form Coolant Through Metric are designed to maximize chip ejection in blind holes. These helically fluted tools are able to cut larger threads of the same pitch. Designed for maximum chip ejection in blind holes Able to cut larger threads of the same pitch CNC ground in the USA Coolant through Solid carbide Helical flutes Product Specifications Tool Number 987103 Cutter Diameter (Inch) 0. 5800" Length of Cut (Inch) 1.