The JBO Thread Ring Gauge (GO) is a precision measurement tool that helps you verify external thread diameters on metric fine threads. Specifically designed for left-hand M15 x 1.5 applications, it provides a clear GO limit to confirm whether components meet the required tolerance. This gauge is ideal for engineers, machinists, quality inspectors, buyers, and hobbyists who need fast, reliable thread checks on day-to-day work.

Built from hardened steel and engineered for durability, the JBO Thread Ring Gauge resists wear in busy workshops and maintains accuracy through repeated use. Its simple, passive design makes it easy for any technician to perform quick, conformance checks on left-hand metric fine threads.

• Immediate go/no-go assessment: Quickly determine if an M15 x 1.5 external thread meets the required tolerance, speeding up inspections and reducing rework.
• Left-hand thread compatibility: Specifically designed for left-hand thread applications with fine pitch, ensuring correct, repeatable checks without confusion.
• Durable hardened steel construction: Built to withstand daily shop use, delivering long life and consistent accuracy even in demanding environments.

Using the JBO Thread Ring Gauge (GO) speeds up quality checks and improves part conformance with metric fine, left-hand threads. Its rugged construction minimizes wear and maintains accuracy, helping engineers, machinists, buyers, and hobbyists achieve reliable results and smoother workflows across production runs.