JBO Thread Ring Gauge (NoGo) - Metric Coarse - Right Hand - 6g - M39 x 4 Widin New and carbon steel—this end mill

and carbon steel—this end mill is built for reliable performance in mold and die applications

Precision: Tight tolerances and precision craftsmanship for accurate cuts and consistent finishes

this through-coolant reamer is ideal for engineers

Type: Stub Reamer (Spiral Flute)

Through coolant and stub-length carbide design: Ensures efficient cooling and chip evacuation

JBO Thread Ring Gauge (NoGo) - Metric Coarse - Right Hand - 6g - M39 x 4 Widin New and carbon steel—this end millThe JBO Ring Gauge (NoGo) Metric Coarse Right Hand 6g M39 x 4 is a precision inspection tool designed to verify external thread diameters for metric coarse threads. It is ideal for quality control teams, engineers, machinists, workshops, and maintenance staff who need quick, reliable pass fail checks to ensure components meet specifications and fit correctly. Go No Go quick checks for metric coarse threads: Quickly determine whether an external thread