JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6h - M39 x 2 G This intermediate precision finishing tool

This intermediate precision finishing tool is built for engineers

clean bore quickly and consistently

The to-order production and clear lead times help you plan purchasing with confidence

This reamer helps you achieve precise

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6h - M39 x 2 G This intermediate precision finishing toolThe JBO Thread Ring Gauge (NoGo) is a precision inspection tool designed to verify external metric threads. Specifically tuned for metric fine threads, it checks M39 x 2 with a 6H tolerance and right hand orientation, helping quality teams, machinists, and assembly technicians quickly determine whether a part meets specification. Built from hardened steel for durability, this gauge delivers reliable performance in busy workshops. The clearly defined