To properly cut even numbered threads using the lathe thread dial indicator shown in the illustration, you should close the lathe split or half-nut on __________. Illustration GS-0084

Correct Answer: Option A — any line on the dial

When the lead screw has an even number of threads per inch, the thread dial indicator allows the half-nut to be engaged at any line on the dial. This ensures the tool bit enters the same thread groove every time, simplifying the process for standard even-numbered thread pitches during routine repairs.