The JBO Thread Plug Gauge is a precision tool for verifying internal metric threads. Designed for engineers, machinists, buyers, tradespeople, hobbyists, and DIY enthusiasts, it helps ensure threaded holes meet exact size and tolerance before assembly. Its Go/No-Go design provides quick, reliable checks so you can confirm fit on the first try.

Specifically calibrated for M22 x 1.5 with a 6G internal thread tolerance, this gauge uses a right-hand orientation to align with common production standards. The rugged, hardened steel construction stands up to daily use in QC benches, workshops, and service environments, delivering stable performance over time.

• Go/No-Go design for rapid inspection: Instantly determine if a threaded hole is within tolerance by performing a simple go/no-go test, reducing guesswork and speeding up quality checks.
• Precise M22 x 1.5, 6G internal thread calibration: Specifically sized for M22 x 1.5 holes with 6G tolerance, ensuring consistent results across parts and minimizing rework.
• Rugged, hardened steel construction: Built to withstand daily use in busy workshops, with wear resistance that preserves accuracy over time.

Using the JBO Thread Plug Gauge in your quality-control routine helps you verify hole size and thread fit quickly and reliably, enabling proper mating with fasteners and components. The Go/No-Go approach reduces inspection time and downtime, while the precise 6G calibration supports consistent fits across production runs. With robust construction, you can rely on accurate checks even in demanding environments, delivering smoother assembly, fewer returns, and improved overall process efficiency.