Milwaukee 5/8"-18 NF 1-7/16" Hex Threading Die is precision machined to create or repair clean, accurate external threads. This threading die features long-lasting laser-etched sizing for clear and easy-to-read markings, along with a protective Black Oxide coating that provides excellent corrosion resistance. The large 1-7/16” hex shape is compatible with 1-7/16” die stocks or can be used with wrenches, ing versatility for various threading tasks. Engineered for durability, it is designed to cut threads in common metals such as brass, aluminum, and mild steel. For optimal performance and thread quality, it is to use this hex die with cutting fluid. Model Number: 49-57-5371