The JBO Thread Plug Gauge is a precision inspection tool designed specifically for metric fine threads. It is ideal for engineers, machinists, quality control teams, and assembly specialists who need fast, reliable checks on threaded holes. This left-hand variant covers M17 x 0.75 with a 6H internal thread tolerance, helping you verify fit and consistency quickly and confidently.

• Fast Go/No-Go Thread Verification: Quickly confirm hole size and thread condition—go gage threads in smoothly to the correct depth, while the no-go gauge prevents over-tolerance installations, speeding up quality checks without guesswork.
• Hardened Steel for Longevity: Built to endure busy workshop environments, the gauge resists wear and maintains accuracy over many uses, reducing downtime and replacement costs.
• Left-Hand Metric Fine Thread Ready (M17 x 0.75, 6H): Specifically engineered for left-hand threads and ISO 6H tolerances, ensuring reliable, repeatable measurements and minimizing cross-threading risks in sensitive applications.

Used for quick, dependable checks in manufacturing, repair, and assembly workflows, this gauge helps you verify that threaded holes meet exact specifications. Its robust construction and precise design support consistent results across lots and shifts, helping your team move from inspection to assembly with fewer reworks and more confidence in every component.