The JBO Thread Plug Gauge (GO) is a precision go/no-go tool for inspecting internal threads in metal parts and assemblies. It’s ideal for machinists, quality control teams, engineers, and workshop technicians who need fast, reliable checks to confirm holes are within spec.

Designed for metric fine threads, this GO gauge targets an M75 x 4 thread with 6H tolerance and a right-handed thread. Crafted from hardened steel, it offers durability and long-lasting performance in demanding environments.

• Exact GO verification for M75 x 4, 6H: Delivers reliable go/no-go results for internal threads, helping you quickly validate hole size and reduce rework.
• Hardened steel construction for long life: Built to withstand daily use in demanding environments, with wear and corrosion resistance that keeps calibration stable over time.
• Right-hand, metric fine design: Optimized for typical right-handed use in standard inspection setups, ensuring consistent insertion and quick readings.

Using the JBO GO plug gauge simplifies threaded-hole inspections, speeds up quality checks, and provides clear pass/fail signals that align with your documentation and standards. Its robust build and precise dimensions help you maintain tight tolerances, reduce scrap, and keep production flowing with confidence.