The JBO Thread Ring Gauge (NoGo) – Metric Fine is a precision tool designed to check external threads on M12 x 1.25, right-hand fasteners and components. Ideal for engineers, quality inspectors, machinists, and shop floor technicians, it helps verify that threaded parts meet the 4h tolerance without guesswork.

The gauge is crafted from hardened steel, delivering durable, long-lasting performance in busy workshops. Its exact geometry and smooth finish support consistent, reliable inspections across shifts and teams.

• Exact metric NoGo gauge for M12 x 1.25 right-hand threads: Quickly verify external thread diameters to the 4h tolerance, preventing undersized parts from passing and reducing rework.
• Hardened steel construction for long-lasting accuracy: Built to withstand daily use, resist wear and corrosion, and retain precise measurements over time.
• Clear, quick pass/fail verification: The NoGo gauge design provides immediate nonconformity indication, speeding inspections and keeping production moving.

Using the JBO NoGo Thread Ring Gauge simplifies and speeds external-thread inspections. It helps you quickly confirm M12 x 1.25 right-hand threads meet the 4h tolerance, cutting rework and downtime. The durable hardened steel body keeps measurements stable over thousands of uses, so you can trust results across shifts and operators. A clear pass/fail indication supports consistent quality decisions and smoother workflow from receiving to final assembly.