•	Thread Pitch micrometer calibrator not available at our local certify to NABL
•	So TPM self checked by ourselves with " Master Thread Plug Gauge " of different frequencies for usage and this is to be done every time for new batches of production.
•	We will enquire TPM calibrator and they are approved to NABL or other standard.
•	Based on our experience and current issue, we will use measuring frequency of TRG for hundred to one fifty numbers only, after that we will send for calibration
•	After calibration and based on the results/wear out in gauge, we will fix the frequency for next usage up to fifty to hundred numbers.
•	Any time we will keep three gauges, one is to production and one is to inspection and another one for stock.
•	Mean time we will enquire for other makes also. 
