The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for metric fine threads. It’s ideal for machinists, quality inspectors, engineers, and maintenance teams who need a fast, reliable check of threaded holes to ensure parts fit together smoothly.

Designed for M34 x 1 right-hand threads with 6H tolerance, the gauge combines accuracy with rugged durability. Made from hardened steel, it stands up to daily use in workshop or production environments, delivering consistent results over time.

• Go/No-Go quick-check design: enables a single insertion to validate both the minimum (Go) and maximum (No-Go) limits for M34 x 1 threads, speeding up inspections and reducing guesswork during assembly.
• Hardened steel construction: resin toughened for wear resistance, delivering long tool life and dependable readings in busy shop floors and QC stations.
• Precisely matched metric sizing: specifically built for metric fine threads (M34 x 1) with 6H tolerance and right-hand orientation, ensuring consistent, easy-to-read results that integrate with standard QA workflows.

Using the JBO Thread Plug Gauge helps you confirm hole threads quickly, minimize rework, and maintain reliable fit across assemblies. Its durable build and clear sizing give you confidence in every measurement, supporting faster setup, tighter quality control, and steadier production performance.