The JBO Thread Plug Gauge is a Go/No-Go inspection tool designed for metric fine threads. It helps engineers, machinists, and inspectors quickly determine whether a threaded hole meets spec, ensuring mating components thread in smoothly and exactly.

Built for rugged use, this gauge features hardened steel construction for long-lasting performance and wear resistance. It is configured for right-hand threads with a 6H tolerance on M2.5 x 0.35, delivering reliable, repeatable checks in busy workshop environments.

• Go/No-Go quick checks: Quickly verify hole tolerance with a simple pass/fail check, speeding up quality control and reducing guesswork.
• Hardened steel durability: Built to withstand daily use, resisting wear and maintaining accuracy over many inspections.
• Precise metric fine-thread compatibility (M2.5 x 0.35, 6H, right-hand): Engineered to match standard metric fine threads for reliable fits and consistent results in production and assembly.

Using the JBO Thread Plug Gauge in your workflow helps you confirm hole size and thread quality before assembly, reducing downtime and ensuring consistent results across parts and processes. Its robust construction and precise Go/No-Go functionality support faster checks, higher first-pass yields, and greater confidence in every build.