The JBO Thread Plug Gauge is a precision tool designed for metric fine-thread inspection. Built for internal holes with fine threads, it uses a Go/No-Go design to confirm whether a thread is within the specified tolerance at a glance. The right-hand orientation and M30 x 1 size make it a reliable choice for both production lines and workshop setups, helping ensure parts will fit together smoothly.

• Go/No-Go design for fast, reliable checks: quickly verify hole threads—easy to interpret results save time and reduce guesswork during quality control and assembly.
• Metric fine thread compatibility: M30 x 1, right-hand, 6G: precisely matched to common metric fine-thread holes, delivering repeatable, consistent results across parts and batches.
• Hardened steel construction for durability: built to withstand daily shop use, resisting wear and corrosion to maintain accurate checks over time.

Using this gauge helps you validate thread quality during setup and inspection, shorten inspection cycles, and minimize rework by ensuring correct thread engagement before parts are assembled. Its sturdy construction and trusted tolerances provide confidence that every measurement supports reliable, repeatable results in both professional and hobbyist environments.