The JBO Thread Plug Gauge is a purpose-built tool for precisely checking metric fine-threaded holes. Designed for Go/No-Go inspection, it helps engineers, machinists, QA inspectors, and hobbyists quickly verify that a threaded pocket meets the exact standard required for reliable assembly. This gauge is tuned for right-hand threads with a M29 x 0.5 specification and built from hardened steel to endure daily shop use while maintaining accuracy.

• Go/No-Go quick verification: Instantly determine if a threaded hole meets the minimum (Go) and maximum (No-Go) limits, speeding up setup and reducing rework.
• Metric fine-thread focus (M29 x 0.5), right-hand: Specifically engineered for fine-pitch metric threads with a right-hand orientation and 6H tolerance to deliver repeatable, reliable checks.
• Rugged, precision construction: Hardened steel body with a knurled grip for secure handling and long-lasting wear resistance that preserves accuracy over many uses.

When speed and accuracy matter, the JBO Thread Plug Gauge delivers clear pass/fail results, helping you tighten tolerances, improve workflow, and ensure consistent thread quality across production runs. Its focused metric specification and durable design provide confidence in every inspection, so you can settle on parts and assemblies that fit right the first time.