The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, ensuring accurate verification of threaded holes in critical assemblies. Built as a right-hand gauge with M34 x 1.5 size and 6H tolerance, it is ideal for machine shops, maintenance teams, and quality-control environments where consistent thread fit matters.

Designed for fast, unambiguous checks, the Go/No-Go design lets you confirm whether a hole is within tolerance at a glance, speeding setup and reducing guesswork on the shop floor. The gauge’s hardened steel construction delivers long-lasting performance, and the knurled handle provides a secure grip for repeatable testing in busy work settings.

• Go/No-Go Quick Checks: Quickly confirm if the threaded hole falls inside tolerance, enabling faster inspections and reduced downtime.
• Metric Fine Thread Precision (M34 x 1.5, 6H): Calibrated for metric fine threads to ensure reliable results for high-precision fits and consistent interchangeability.
• Hardened Steel Durability + Secure Grip: Built to withstand daily use with wear-resistant steel, and a knurled handle for a secure, comfortable grip during testing.

In practical use, this gauge streamlines quality control, accelerates first-article and in-process inspections, and helps ensure reliable, repeatable assemblies across production and maintenance tasks. It provides clear pass/fail results, reduces rework, and supports tighter tolerances with confidence.