JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M40 x 1.5 Endmill25 and advanced hobbyists who demand

and advanced hobbyists who demand accurate hole sizes with durable wear resistance

minimizing runout and delivering reproducible finishes across jobs

to achieve ISO H4 tolerances in a compact stub form factor

Toolex Reamer - Stub Type - Spiral Flute - Straight Shank - HSS-E - H4 - 18

HSS (M2) with a precise 18

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M40 x 1.5 Endmill25 and advanced hobbyists who demandThe 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