The JBO Thread Ring Gauge (GO) is a precision tool for quick, reliable verification of external thread diameters on fasteners and threaded components. Sized for metric fine threads, it helps inspectors and machinists confirm that M27 x 1 threads meet the required tolerance and fit. Built as a left-hand GO gauge with 6g tolerance, it supports accurate go/no-go inspections across quality control, manufacturing, and maintenance environments.

• Precise metric fine sizing (M27 x 1): Calibrated specifically for the M27 x 1 metric fine thread, enabling fast, pass/fail checks and consistent thread conformity across parts.
• Left-hand threading compatibility: Designed to accurately inspect left-hand threaded components, reducing read errors and ensuring correct thread validation.
• Durable hardened steel construction: Made to withstand daily workshop use, resisting wear and deformation to maintain long-lasting accuracy over many inspections.

With the JBO Thread Ring Gauge (GO), you gain a straightforward, dependable tool that speeds QC checks, minimizes rework, and supports reliable thread fitting in both production and field maintenance. Its simple go/no-go design helps you identify conforming components at a glance, improving workflow and overall reliability in demanding environments.