The GO / NO GO plug gauge for helicoil wire thread inserts has the important function of checking the correct execution of the tapping
From the GO end, the gauge must enter without effort, rotating it with only three fingers. If it does not pass or if resistance is encountered, it's necessary to check the size of the preparation hole and verify that the tap is not worn
From the NO GO end, characterized by a shorter thread, the gauge must not enter beyond the first two turns. If it enters deeper, it means that the hole is too large
The plug gauge for STI thread, is specifically designed to control thread prepared for wire thread inserts, which we remind you, is oversized compared to a traditional thread. Therefore the use of standard gauges will be useless on the holes prepred for helicoil inserts