The JBO Thread Plug Gauge (NoGo) is a precision measurement tool for metric fine threaded holes. Designed for engineers, machinists, quality inspectors, and workshop technicians, it provides a clear, reliable go/no-go check for M50 x 2 holes with 6H tolerance.

Made from hardened steel, this LH (left-hand) NoGo gauge is built to resist wear and maintain accurate measurements in demanding shop environments, delivering long service life and repeatable results.

• Metric Fine LH NoGo design: Specifically engineered for metric fine threads with a left-hand orientation, it enables quick pass/fail checks for M50 x 2 holes with 6H tolerance, improving inspection speed and accuracy.
• Hardened steel durability: Precision-ground and hardened to resist wear, ensuring reliable performance across thousands of measurements in busy workshops.
• Accurate, repeatable dimensions: NoGo dimensions are machined to tight tolerances, delivering consistent results across operators and parts and reducing the need for rework.

This plug gauge helps you streamline quality control by delivering fast, dependable checks on threaded holes. With durable construction and precise dimensions, you’ll reduce downtime, improve first-pass yield, and feel confident that your parts meet the required standards.