The JBO Thread Plug Gauge (NoGo) is a metric fine thread plug gauge designed to quickly verify the size of internal threaded holes. Tailored for metric fine threads, it checks M50 x 1 holes with a 6H tolerance and is oriented for left-hand threads. Built for durability, this left-hand gauge delivers reliable go/no-go checks in demanding shop environments.

• Metric fine-thread precision: Specifically ground for M50 x 1 with a 6H tolerance, enabling fast, accurate evaluation of internal threads and reducing rework.
• Hardened steel durability: Constructed from hardened steel to resist wear and provide long service life in busy workshops and production lines.
• Left-hand NoGo design for quick checks: Optimized for left-hand thread holes, delivering reliable go/no-go results that speed up inspection and ensure consistent quality.

Using this gauge helps simplify quality control, speeding up inspections and reducing guesswork across your workflow. Its precise sizing supports quick identification of out-of-tolerance holes, minimizing downtime and rework while maintaining consistent, high-quality results across parts and assemblies.