We produce and supply the three-wire units facilitate measurement of the pitch diameter of screw thread with standard micrometer. Available in single pair or in a complete set for micrometer with 6.35, 6.50 and 8.0mm diameter measuring faces. Accuracy: +/-0.5um (diametrical tolerance)Hardness: 700HVMeasuring range: Metric pitch: 0.25-6.0mmWhitworth TPI: 60-4.5US Std. TPI: 80-4.5 ,Also we can produce and supply Calibrate Gauge for Thrtead Ring Gauge, Go & No go Gauge

Specification:2-500mm

 We can make all kinds of types Go & No go Gauge according to  customer's demand.