The JBO Thread Plug Gauge (GO) - Metric Fine - Right Hand - 6G - M42 x 1.5 is a precision GO gauge designed to verify threaded holes to metric fine standards. It serves machinists, inspectors, engineers, and maintenance technicians by providing quick, reliable checks that a hole meets the required thread specification for assembly and function.

Crafted from hardened steel, this plug gauge offers excellent wear resistance and long service life in demanding shop environments. Its user-friendly design helps identify properly threaded holes at a glance, supporting consistent quality control and precise engineering work.

• Fast, repeatable GO checks: Quickly determine whether a threaded hole accepts the GO gauge, delivering consistent results and reducing inspection time.
• Durable hardened steel construction: Built to withstand daily use and resist wear, helping maintain accuracy over many inspections.
• Precisely matched for Metric Fine M42 x 1.5, Right‑Hand, 6G threads: Ensures reliable fit with standard threads, supporting accurate quality control and reduced rework.

Using this gauge helps streamline inspections, improves workflow by delivering immediate pass/fail clarity, and supports reliable, repeatable results across parts and production runs. It’s a dependable choice for quality-conscious shops that rely on quick, confident threaded-hole verification.