The JBO Thread Plug Gauge (GO) – Metric Fine is a precision inspection tool designed to verify threaded holes quickly and reliably. Sized for M75 x 1.5 metric fine threads, this left-hand GO gauge helps machinists, quality inspectors, and engineers confirm holes meet exact specifications with minimal guesswork.

Crafted from hardened steel, it delivers durable, wear-resistant performance in demanding shop environments. Its straightforward design makes it easy to identify properly threaded holes during setup and quality control, supporting consistent, repeatable results.

• Accurate GO thread verification: Quickly confirm that a hole accepts the M75 x 1.5 GO gauge, ensuring threads are within specification and avoiding misfits in assembly.
• Rugged, wear-resistant construction: Hardened steel provides long life and reliable performance in busy workshops, reducing downtime and replacement costs.
• Ergonomic, user-friendly design: Knurled body and standardized size enable fast, confident insertions, even with gloves, speeding up inspection cycles and improving consistency.

By incorporating this GO gauge into your inspection routine, you can quickly verify that threaded holes meet the M75 x 1.5 specification, reduce rework, and speed up setup for manufacturing and assembly. The combination of precise metric fine threading, left-hand orientation, and 6H tolerance delivers consistent, reliable results across parts and batches, helping you maintain quality and traceability without slowing production.