The JBO Thread Plug Gauge is a precision tool designed for metric fine threads, built to quickly verify internal threads in holes and ensure a reliable fit. This right-hand gauge is specifically sized for M40 x 3 threads with a 6H tolerance, making it ideal for workshop teams and inspectors who demand consistent, repeatable checks.

Built for tough workplace conditions, the gauge features hardened steel construction and a textured knurled body for secure handling—even with gloves on. Its Go/No-Go design provides fast, decisive pass/fail results to keep production moving smoothly.

• Go/No-Go Quick-Check: Enables fast, objective verification of hole threads—Go confirms the thread accepts the gauge, No-Go ensures out-of-tolerance conditions are caught, reducing guesswork and rework.
• Metric Fine Thread Precision (M40 x 3, 6H): Specifically matched to metric fine-thread standards, delivering reliable checks for mating parts and helping prevent threading mismatches in critical assemblies.
• Durable Hardened Steel with Secure Handling: Constructed from hardened steel for long life and wear resistance, with a knurled grip that provides confident handling and precise alignment during inspections.

This gauge streamlines quality control, accelerates assembly workflows, and improves overall threading accuracy across production runs. Rely on its rugged build and clear go/no-go feedback to deliver consistently fitting components and reduce downtime.