JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M40 x 1.5 Endmill25 while the corner radius helps

while the corner radius helps create smooth transitions and extend tool life in abrasive or high-wear applications

while the 6 mm shank fits standard tool holders for quick changes and steady performance on a variety of CNC setups

This tool features a 6 mm cutting diameter and a 6 mm shank

minimizing runout and delivering reproducible finishes across jobs

standard-length HSS reamer built for precision bore finishing

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M40 x 1.5 Endmill25 while the corner radius helpsThe JBO Thread Ring Gauge (GO) Metric Fine is a precise go gauge designed to verify external thread diameters on fasteners, fittings, and machined parts. Its ideal for inspectors, machinists, engineers, and quality teams who need quick, reliable confirmation that threaded components meet exact standards. Made from hardened steel for durability, this right hand ring gauge covers the metric fine thread specification M40 x 1. 5 with a 6g class. The GO