The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for metric fine threads, helping you quickly verify that threaded holes meet exact standards. This left-hand variant is ideal for shops and QA teams working with fine-thread assemblies, including sizes like M25 x 1, ensuring reliable checks without guesswork.

Built for daily use, the gauge features hardened steel construction that delivers long-lasting wear resistance in busy work environments. Its compact, hand-held design makes inspection fast and straightforward, whether you’re setting up a machine, performing in-process checks, or validating final assemblies.

• Go/No-Go quick checks: Instantly determine whether a hole is within tolerance, speeding up inspections and reducing rework.
• Left-hand metric fine-thread coverage (M25 x 1): Specifically designed to verify left-hand holes, aligning with your production specs and simplifying documentation.
• Hardened steel, durable construction: Built to endure daily handling and withstand wear, providing consistent performance over time.

Using the JBO Thread Plug Gauge helps you streamline your workflow by delivering reliable, repeatable thread checks. This leads to tighter tolerances, fewer misfits, and faster assembly across production runs—ultimately improving overall reliability and efficiency on the shop floor.