The JBO Thread Plug Gauge (GO) is a precision go gauge designed for metric fine threads, specifically sized for M125 x 4 with right-hand threading and a 6H tolerance. Ideal for engineers, machinists, inspectors, and quality teams, it provides a fast, reliable way to verify that threaded holes meet exact spec before assembly or machining continues.

Crafted from hardened steel, this GO gauge delivers outstanding wear resistance and long-lasting performance in busy workshop environments. Its straightforward, user-friendly design makes it easy to recognize a correctly threaded hole at a glance, helping you speed up quality checks without sacrificing accuracy.

• Precise Go Gauge for Metric Fine Threads: Quickly verify M125 x 4 holes with a clear pass/fail indication, reducing inspection time and uncertainty in threaded-hole checks.
• Hardened Steel Construction: Built to withstand daily use in demanding environments, maintaining dimensional stability and extending service life between replacements.
• Right-Hand 6H Thread Fit: Engineered to match standard metric thread conventions, ensuring consistent, reliable results across parts and assemblies.

In routine use, this GO plug gauge helps you confirm thread engagement early, minimize rework, and keep production moving smoothly. It supports precise quality control, speeds up inspections, and gives you confidence that your threaded holes will perform as designed in the final product.