The JBO Thread Ring Gauge (NoGo) is a precision tool for checking external metric coarse threads. Specifically designed for left-hand threads (M18 x 2.5) with a 6g tolerance, it helps production teams, quality inspectors, and machinists quickly verify that parts meet the required dimensions. This NoGo gauge supports efficient go/no-go testing to confirm correct fit and interchanges.

Constructed from hardened steel, it delivers long-lasting durability in demanding shop environments, resisting wear even with frequent handling and routine use. Its clear, straightforward design makes it easy to identify parts that are out of specification, reducing guesswork and rework.

• Go/No-Go quick verification: The NoGo design provides a fast pass/fail check for M18 x 2.5 LH coarse threads, helping inspectors sort compliant parts from non-conforming ones with less effort and downtime.
• Durable hardened steel construction: Built to withstand daily use in busy workshops, the gauge resists wear and maintains accuracy over time, reducing replacement and maintenance costs.
• Metric coarse, left-hand compatibility: Precisely machined for LH coarse threads, this gauge ensures reliable, standards-aligned measurements and consistent results across batches.

Using the JBO NoGo Thread Ring Gauge, you gain a reliable inspection step that minimizes errors, speeds up quality control, and improves overall fitment and performance in your manufacturing or assembly workflow.