The JBO Thread Plug Gauge is a precision tool designed to verify metric coarse holes against the M20 x 2.5 standard. In left-hand configurations, it helps machinists, inspectors, and maintenance teams quickly confirm correct threading before assembly or repair work.

• Go/No-Go inspection design: Quickly verify that a threaded hole meets the M20 x 2.5 coarse-thread specification; the go end should pass, while the no-go end remains outside tolerance, enabling fast, reliable pass/fail decisions.
• Durable hardened steel construction: Built to withstand regular workshop use, resisting wear and maintaining accuracy for long-term service and repeatable inspections.
• Left-hand, 6G, M20 x 2.5 configuration: Specifically configured for left-hand metric coarse threads, ensuring precise checks for this common threading standard.

Using the JBO Thread Plug Gauge helps you streamline quality control, reduce rework, and protect assemblies by delivering consistent, dependable measurements. The rugged design provides confidence in everyday use, whether in production, maintenance, or workshop settings.