JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M5 x 0.25 S&E making it well-suited for materials

making it well-suited for materials under 55 HRc

it uses a left‑hand spiral flute with right‑hand cutting to provide stable reaming performance

finishing-friendly performance across aluminum and non‑ferrous workpieces

It’s designed for reliability in high-demand machining environments

Built with a tapered neck and four cutting flutes

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M5 x 0.25 S&E making it well-suited for materialsThe JBO Thread Ring Gauge (GO) is a precision inspection tool designed to quickly verify external thread diameters on metric fine threads. It is ideal for machinists, quality control engineers, and assembly teams, offering a reliable go no go check to confirm parts meet required standards. Crafted from hardened steel for durability in busy workshops, this GO gauge is tailored for right hand metric fine threads, specifically M5 x 0. 25 with a 6g