The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for metric fine threads, specifically for M40 x 1.5 right-hand threads. It lets you quickly verify threaded holes, ensuring parts fit together smoothly and avoiding guesswork during assembly.

• Go/No-Go quick inspections: Quickly verify threaded holes meet size tolerances, speeding up quality checks and reducing assembly delays.
• Metric fine-thread compatibility: Precisely suited for M40 x 1.5 right-hand threads, ensuring accurate hole sizing for critical assemblies.
• Hardened steel with 4H tolerance: Durable, wear‑resistant construction with a 4H tolerance class for reliable, repeatable measurements over time.

With this gauge in your toolkit, you’ll streamline hole inspection, shorten setup times, and reduce rework by confirming fit early in the process. The rugged construction stands up to daily workshop use, while the Go/No-Go design provides clear pass/fail decisions—helping teams maintain consistent quality and confidence in every assembly.