JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M39 x 1 M&D accurate alignment in standard toolholders

accurate alignment in standard toolholders and CNC setups

The 2-flute geometry paired with a 30° helix delivers steady cutting action and a good balance between material removal and surface finish

With a 16 mm diameter and 160 mm overall length

Durable M2 HSS with DIN 206-B straight shank: Built for wear resistance and long life

Efficient Chip Evacuation and Low Cutting Forces: Sharp edges and flute geometry promote fast chip clearance

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M39 x 1 M&D accurate alignment in standard toolholdersThe JBO Thread Ring Gauge (GO) Metric Fine, Right Hand, M39 x 1 is a precision inspection tool designed to verify external thread diameters on fasteners, fittings, and machined components. Its ideal for engineers, inspectors, machinists, and quality teams who need fast, reliable checks to confirm threads conform to exact standards. Specifically tuned for metric fine threads, including M39 x 1 right hand configurations, this GO gauge provides a quick