Industrial Copper-Top Tap, model 17607 (part 4023914), is a 1/2-20 BT tap designed to cut threads in metal holes. The Copper-Top designation identifies its copper-coated style, and the 1/2-20 size specifies the thread diameter and pitch. This tapping tool is used in metalworking applications where 1/2-inch bolts with 20 threads per inch are required.
