JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M20 x 1 Die & Mould Collet Chucks helping you minimize run-out errors

helping you minimize run-out errors without sacrificing grip

this reamer helps streamline workshop workflows

this reamer uses M2 high-speed steel and features a left-hand spiral flute with right-hand cutting for efficient material removal

this 3‑flute ball nose delivers smooth contouring and accurate radii on complex cavities

delivering smoother and more precise cutting operations

JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M20 x 1 Die & Mould Collet Chucks helping you minimize run-out errorsDesigned for engineers, inspectors, and shop floor teams, the JBO Thread Ring Gauge (NoGo) Metric Fine Left Hand 6g M20 x 1 provides a precise, reliable way to verify external thread diameters to the M20 x 1 fine pitch standard. This left hand gauge is built for quick, on the spot checks, helping you identify non conforming threads and keep production moving with confidence. Go No Go quick checks: Quickly determine whether an external thread meets the