The JBO Thread Plug Gauge is a precision tool designed for metric fine threads, helping machinists, quality inspectors, and assembly technicians quickly verify threaded holes. Its Go/No-Go design provides a clear pass/fail check, so parts thread together with confidence and minimal guesswork.

Built for durability and consistency, this gauge features hardened steel construction for long-lasting wear resistance in demanding shop environments. It is specifically configured for right-hand threads in the 4H class with an M35 x 1 size, delivering reliable, repeatable checks across parts.

• Go/No-Go quick checks: Quickly determine acceptability of threaded holes with a two-step pass/fail test, saving inspection time and reducing guesswork on fit.
• Hardened steel durability: Built to withstand heavy workshop use, this gauge resists wear and maintains accurate measurements over many cycles.
• Metric fine-thread compatibility: Precisely sized for right-hand 4H M35 x 1 threads, ensuring consistent, reliable checks across parts and assemblies.

Using the JBO Thread Plug Gauge helps streamline quality control, shorten setup and inspection time, and ensure mating parts assemble correctly on the first try, delivering dependable results across production runs and field service.