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Thread plug gauges: 

1 :Thread Plug Gauges are used to gauge threaded holes prior to insertion of screw thread inserts. 

2:Thread plug gauges check the size of internal threads to ensure the threads are within its designed tolerance limits. 

3: Precision hand lapped to provide superior accuracy, optimum finish and maximum wearability. 

4: Screw thread inserts are used to repair a damaged thread or to provide stronger thread assembly. 

5:GO and/or NO GO thread plug members; Class 6H of fit for metric thread plug; 

Class 6H of fit for metric thread plug. 

6:Clcoil STI thread plug gauge are manufactured of oil hardened tool steel; Most Metric sizes in the stock.