The JBO Thread Plug Gauge is a precision tool designed for checking metric fine threaded holes. It helps machinists, quality inspectors, and assembly professionals quickly confirm whether internal threads meet specification and will accept the mating bolt. This right-hand gauge is sized M40 x 0.75 with a 6H tolerance, and its Go/No-Go design makes fast, confident inspections part of your routine.

• Go/No-Go design for rapid inspection: Quickly determine if the hole threads are within specification, reducing measurement steps and downtime while improving first-pass acceptance.
• Durable hardened steel construction: Built to withstand busy shop environments, delivering long tool life and resistance to wear.
• Metric fine-thread sizing (M40 x 0.75, right-hand, 6H): Precisely matched to your target hole, ensuring reliable pass/fail results and consistent mating with components.

The JBO Thread Plug Gauge helps you verify internal threads quickly and confidently, reducing guesswork and rework while speeding setup and assembly. With its metric fine-thread focus, durable construction, and precise M40 x 0.75 sizing (6H) in a right-hand orientation, you can trust it to deliver consistent, repeatable results across jobs and shifts.