The JBO Thread Plug Gauge is a precision tool designed for metric fine threads, enabling fast and reliable verification of internal threads in holes and mating parts. Specifically configured for M40 x 1, right-hand threads with a 6H tolerance, this gauge is ideal for manufacturing floors, quality labs, and service environments where accurate thread fit is critical. Its Go/No-Go design gives inspectors and machinists a clear, instant indication of conformance, helping you move parts through quality checks with confidence.

• Go/No-Go Validation: speeds threaded-hole inspections by delivering an immediate pass/fail verdict for M40 x 1 right-hand threads, reducing guesswork and speeding up assembly decisions.
• Durable Hardened Steel Construction: built to endure daily workshop use with wear-resistant steel that holds its accuracy over thousands of insertions and removals, lowering calibration needs and downtime.
• Precision for Metric Fine Threads: engineered specifically for metric fine threads to ensure consistent engagement and reliable verification across parts, supporting tight tolerances in critical applications.

Used correctly, the JBO Thread Plug Gauge helps streamline workflows, reduce rework, and improve measurement confidence across production and assembly stages. Its robust build and precise sizing translate to fewer unexpected thread mismatches, clearer quality records, and faster passage of components into final assembly.