The JBO Thread Plug Gauge (NoGo) for Metric Fine threads is a precision inspection tool designed to verify internal threads in metric fine hole sizes. Sized for M58 x 1.5 with a 6G tolerance and right-hand orientation, this NoGo gauge helps inspectors and machinists confirm holes meet the specified thread form and dimension without guesswork.

Machined from hardened steel with a knurled, easy-grip body, the gauge delivers lasting accuracy in busy shops and demanding environments. Its rugged construction stands up to daily use in manufacturing, automotive, and hydraulic applications.

• Metric Fine M58 x 1.5, 6G specification: Precisely matched to the target hole size for metric fine threads, enabling repeatable, accurate no-go checks and clear pass/fail decisions.
• NoGo design for reliable tolerance verification: Helps quickly identify undersized or poorly formed internal threads, reducing guesswork and speeding up quality checks.
• Durable hardened steel construction: Built to resist wear in busy inspection environments, providing long-lasting accuracy and dependable performance over many uses.

Used in quality control and production workflows, this gauge helps your team validate threaded holes with confidence, streamline inspections, and minimize rework by delivering fast, reliable verification of metric fine threads.