Harshman Gauges & Engineering Co. Offers Thread Measuring Wires. Harshman Gauges & Engineering Co. Supplies Thread Ring, Plug Gauges, Thread Plug Gauges Thread Ring Gauges, etc. Thread Measuring Wires come in range: 0.17, 0.22, 0.250, 0.290, 0.335, 0.455, 0.530, 0.620, etc. The Thread Measuring Wires are used to check effective diameter of thread gauges, taps and any other threads. The standard set consists of 16 sizes in mm. The set ranges can be supplied either in two wire or three wire sets.
