The JBO Thread Plug Gauge is a precision inspection tool for metric coarse threads, designed for right-hand M4.5 x 0.75 with a 6G tolerance. Its Go/No-Go design lets you quickly confirm threaded holes meet spec, helping ensure reliable assemblies and consistent fitment in production or repair work.

• Go/No-Go Design: Quickly validate threaded holes and reject non-conforming parts, reducing inspection time and guesswork.
• Hardened Steel Construction: Built to withstand frequent use in busy shops, delivering long-lasting accuracy and repeatable results.
• Metric Coarse Thread Compatibility (Right-Hand, 6G, M4.5 x 0.75): Specifically tailored to standard metric coarse threads, ensuring reliable checks across typical parts and assemblies.

Using this gauge streamlines quality control by providing fast, dependable checks that support proper thread engagement, reduce rework, and improve overall assembly performance. The durable construction gives you confidence through daily use, while the instrument’s clear pass/fail criteria helps technicians make quick, accurate decisions and keep production moving.