The JBO Thread Ring Gauge (NoGo) is a precision tool for verifying external thread diameters on threaded components. This metric fine gauge is designed for M20 x 1.5 left-hand threads (6g), making it ideal for workshops, manufacturing floors, and quality-control labs that demand reliable size checks and quick decision-making during assembly or inspection.

Crafted from hardened steel for long-lasting wear, the NoGo gauge delivers consistent performance in busy environments. Its ring design promotes quick, repeatable checks and clear identification of out-of-spec parts, helping you keep production moving and standards intact. The left-hand orientation is built into this model to simplify use on reverse-thread applications.

• NoGo precision check for M20 x 1.5 left-hand threads: Quickly determine if the external thread diameter exceeds the maximum material limit, enabling fast go/no-go decisions and reducing inspection time.
• Hardened steel construction for durability: Withstand demanding use and maintain accuracy over thousands of cycles in production and QC environments.
• Metric fine threading compatibility (6g, M20 x 1.5): Specifically tuned to metric fine standards, ensuring reliable, repeatable results across parts and assemblies.

Using this gauge helps streamline quality control, minimizes downtime from rework, and supports consistent threading across batches. It gives inspectors and machinists a confident, efficient tool to verify that every part meets exact specifications and tolerances.