The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, making it ideal for machinists, quality teams, engineers, and maintenance technicians who need fast, reliable verification of threaded holes. It helps ensure mating parts thread smoothly every time by confirming both the fit and tolerance in one simple check.

This Go/No-Go gauge is tailored for M29 x 1 right-hand threads with a 6G tolerance, and is built with hardened steel for lasting performance in busy workshop environments. Its robust construction resists wear, helping you rely on accurate checks over many uses.

• Go/No-Go design for quick acceptance: Instantly confirm whether a threaded hole meets the intended size and tolerance, reducing inspection time and guesswork.
• Durable hardened steel construction: Withstands daily shop use, maintaining precision and delivering long service life even in demanding environments.
• Metric fine thread precision (M29 x 1, Right Hand, 6G): Specifically engineered for metric fine threads, ensuring consistent, repeatable checks that align with standard manufacturing practices.

Using this gauge streamlines quality control and assembly workflows by delivering fast, accurate pass/fail results. Its rugged build and metric-specific sizing help reduce rework, improve first-pass yields, and provide confidence that threaded components will assemble correctly across your production line.