... , workpiece with parallel planes etc.2. Pitch diameter of internal thread, thread, thread ring gauge, thread plug gauge. ♥ Dial indicator inspection♥ External micrometer inspection♥ Gauge ... ) Universal Measuring Accessories 14~112 Thread Measuring Accessoriesa) Thread PitchDiameter MeasuringMax. 200mmPitch 0.5~6 b) Internal Thread Pitch Diameter MeasuringUsing small-size measuring ...