The JBO Thread Plug Gauge is a precision inspection tool tailored for metric fine threads. It's ideal for machinists, inspectors, and assembly teams who need fast, reliable checks of threaded holes to ensure perfect fit with fasteners and mating parts.

This right-hand Go/No-Go gauge is sized for M20 x 0.5 with a 6H tolerance class. Crafted from hardened steel, it delivers durable performance in busy shop floors and QA benches, with wear resistance that stands up to daily use.

• Go/No-Go quick verification: Quickly confirm both the minimum and maximum thread limits in a single pass, speeding setup and reducing rework.
• Hardened steel construction: Built to endure daily use, resist wear, and maintain accuracy over time in demanding workshop environments.
• Metric fine-thread compatibility (M20 x 0.5, 6H): Precisely sized to match the intended hole specification, ensuring consistent checks for high-tolerance assemblies.

With the JBO Thread Plug Gauge, you gain confidence in every measurement, a streamlined inspection workflow, and fewer quality issues from mis-timed or undersized threads. The durable construction and clear Go/No-Go feedback help you maintain productive throughput, improve consistency across parts, and rely on accurate checks throughout your manufacturing or repair tasks.