The JBO Thread Plug Gauge - Metric Fine Go/No-Go is a precision inspection tool designed for metric fine threads. Built for engineers, machinists, and assembly professionals working with exact M40 x 2 threads, it helps you verify hole tolerances quickly and confidently.

With a right-hand orientation and 6G tolerance, this gauge enables fast, reliable checks that keep your production moving and your assemblies fitting accurately every time.

• Go/No-Go Quick-Check: Quickly determine if a threaded hole is within spec—insert the go side for a smooth fit and ensure the no-go side does not pass, reducing guesswork and speeding up quality assurance.
• Right-Hand 6G Metric Fine Thread Compatibility: Precisely calibrated for metric fine threads like M40 x 2, providing consistent, repeatable gauging for common production applications.
• Hardened Steel with Knurled Body: Built for durability in busy workshops; the knurled surface offers a secure, non-slip grip even with gloves, ensuring accurate handling and placement.

In daily use, this gauge helps you streamline inspection, improve fit reliability, and minimize rework. Its robust construction and intuitive go/no-go operation deliver dependable results, so you can trust every measurement and keep your workflow moving smoothly from setup to final assembly.