The JBO Thread Plug Gauge (GO) is a metric fine, right-hand GO plug gauge designed to verify threaded holes meet precise standards. It’s ideal for engineers, machinists, quality inspectors, and manufacturing technicians who perform routine hole checks to confirm fit with the corresponding metric bolts (M150 x 3). The GO gauge enables quick, reliable pass/fail checks that keep production moving and reduce rework.

Designed for durability, this gauge is crafted from hardened steel to withstand daily use in demanding work environments. Its precise dimensions and finish ensure consistent measurements, while the knurled body provides a secure grip for fast, confident insertions—even with gloves—making quality control faster and more accurate.

• Precise GO gauge for quick hole acceptance: Quickly determine if a threaded hole meets the metric fine thread standard (M150 x 3) with a clear pass/fail check, reducing inspection time and downstream rework.
• Durable hardened steel construction: Built to resist wear and maintain accuracy after repeated use in busy workshops and production lines.
• Ergonomic, user-friendly design: Knurled grip and straightforward geometry enable easy handling and reliable readings, even in tight spaces or with gloves.

By delivering consistent accept/reject results, the JBO Thread Plug Gauge helps streamline quality control, shorten setup times, and ensure parts reliably mate with standard fasteners. It supports precise, repeatable inspections across manufacturing, assembly, and maintenance workflows, giving you confidence that every hole meets the required metric fine thread spec.