The JBO Thread Plug Gauge is a precise, easy-to-use tool designed for inspecting metric coarse threads in threaded holes. Built for right-hand M16 x 2 applications and 4H tolerance, it helps engineers, buyers, tradespeople, hobbyists, and non-technical customers verify fit quickly and confidently. The Go/No-Go design provides a clear pass/fail indication, so you can determine whether a hole meets the standard without trial-and-fit.

Manufactured from hardened steel, this plug gauge stands up to daily shop use and repeated checks, delivering consistent accuracy over time and resisting wear that can distort measurements.

• Go/No-Go verification for fast, confident checks: Quickly determine if a threaded hole meets the required M16 x 2 coarse-thread spec, reducing inspection time and rework.
• Hardened steel construction for durability: Designed to endure the rigors of busy workshops, providing long-lasting performance even with frequent use.
• Metric coarse thread compatibility (M16 x 2, Right Hand, 4H): Ensures reliable, repeatable checks for common coarse-thread holes, supporting consistent quality control across parts.

With this gauge in your toolkit, you can streamline quality control, reduce inspection time, and ensure every component threads in cleanly and reliably. The combination of a purpose-built Go/No-Go design and robust materials helps you maintain high standards, minimize downtime, and improve overall manufacturing or maintenance workflows.