The JBO Thread Plug Gauge is a precision tool designed for metric fine threads, helping machinists, engineers, and quality inspectors quickly verify the internal threads of holes to ensure a proper, reliable fit in assemblies. Its Go/No-Go design streamlines inspection, reducing guesswork and speeding up quality checks in busy work environments.

Designed for right-hand threads with a 4H tolerance, this gauge is specifically calibrated for M18 x 2 applications. It features a hardened steel body for long-lasting performance that stands up to daily use in demanding shop settings.

• Go/No-Go design for fast acceptance checks: Instantly determine if a threaded hole is within spec by testing the go end (fits) and the no-go end (does not fit), reducing inspection time and rework.
• Metric fine thread compatibility (M18 x 2): Precisely calibrated for fine-pitch metric holes, delivering dependable readings that ensure critical assemblies mate correctly.
• Hardened steel construction: Built to endure frequent handling and toolroom use, providing durability and stable accuracy over many cycles.

With the JBO Thread Plug Gauge in your toolkit, you’ll streamline thread inspection, improve first-pass assembly accuracy, and maintain consistent quality across parts and operators. It’s a reliable, straightforward solution for daily QC workflows, production setups, and service work.