The JBO Thread Plug Gauge is a precision tool designed to quickly verify metric fine-thread holes. It helps you confirm mating parts will fit as intended, keeping production moving with clear Go/No-Go decisions.

Designed for M9 x 0.75 fine threads with a left-hand orientation and 6H tolerance, this gauge is built from hardened steel to resist wear and deliver dependable performance over time.

• Go/No-Go Quick Verification: Quickly confirms whether a threaded hole meets the M9 x 0.75 left-hand specification, speeding up quality checks and reducing assembly delays.
• Metric Fine Thread Precision: Specifically tuned for fine-thread holes, ensuring accurate assessments for critical components and assemblies.
• Durable Hardened Steel with Left-Hand Design: Built to endure daily workshop use, with a left-hand thread orientation tailored for applications that require it.

Using the JBO Thread Plug Gauge helps streamline inspection workflows, reduce guesswork, and improve consistency across parts and batches. Its robust construction and precise Go/No-Go functionality support faster setup, fewer reworks, and more reliable fits in manufacturing, maintenance, and repair environments.