The JBO Thread Ring Gauge (GO) is a precision inspection tool designed to quickly and reliably verify external metric fine threads. Specifically configured for the left-hand M30 x 2 thread with a 6g tolerance, this GO gauge helps quality teams, engineers, and machinists confirm that parts meet exact diameter and pitch requirements without guesswork.

• Fast GO/No-Go verification for metric fine threads: Quickly determine whether a part’s external thread matches the M30 x 2 left-hand, 6g specification, streamlining inspections and reducing downtime.
• Durable hardened steel construction: Built to resist wear in busy workshop environments, delivering consistent performance and long service life even after many uses.
• Precisely engineered for reliable conformance: Meticulously machined to exact metric fine tolerances, ensuring easy placement and repeatable pass/fail results across production runs.

Together, these qualities help you speed up inspections, minimize rework, and maintain tight thread tolerances with confidence. The JBO GO gauge supports efficient quality control workflows, delivering dependable, repeatable results for left-hand threaded components and critical assemblies.