The JBO Thread Plug Gauge (GO) – Metric Fine is a precision tool for quickly verifying threaded holes in a wide range of components. Perfect for engineers, machinists, quality teams, and skilled hobbyists, it confirms a hole’s compatibility with M68 x 3 threads using a simple go/no-go check, speeding inspection and reducing guesswork. Crafted from hardened steel, this gauge resists wear in busy shops and labs, delivering reliable performance day after day.

• Instant go/no-go verification: Quickly confirm that a hole accepts the M68 x 3 thread gauge, delivering a clear pass/fail result to speed up inspection and reduce rework.
• Hardened steel durability: Built to withstand heavy use in production environments, delivering long tool life and consistent accuracy from the first hole to the last.
• Right-hand, metric-fine design: Optimized for standard metric threads with fine pitch (M68 x 3) and 6H tolerance, ensuring reliable measurements and compatibility with common inspection setups.

By using the JBO GO gauge, you gain faster, more reliable thread inspections, helping your team keep production moving and reduce bottlenecks caused by ambiguous fits. The hardened steel body maintains accuracy over thousands of uses, while the GO gauge provides clear, intuitive reading—no guesswork required. This makes it ideal for quality control loops, assembly lines, and precision fabrication projects alike.