The JBO Thread Plug Gauge is a precision tool built for metric fine threads, designed to provide fast, reliable checks of threaded holes. Its Go/No-Go design lets you verify fit in seconds, helping ensure assemblies go together smoothly and consistently.

This right-hand gauge targets M20 x 0.5 threads with a 6G tolerance, giving you the exact specification you need for precise inspection. Constructed from hardened steel and finished with a knurled grip, it stands up to daily use in busy shops while staying easy to handle, even with work gloves.

• Go/No-Go quick checks: Enables fast, confident hole inspection by showing whether the hole accepts the maximum (Go) size and rejects the minimum (No-Go), reducing guesswork and downtime.
• Metric fine thread precision (M20 x 0.5, Right Hand, 6G): Ensures you’re testing the exact thread size and orientation used in your parts for reliable, repeatable results.
• Durable, knurled steel construction: Hardened steel provides long-lasting wear resistance, while the knurled surface ensures a secure grip for accurate handling in any workspace.

In daily QC and assembly work, this gauge helps you speed up inspections, minimize rework, and maintain consistent thread quality across parts and batches. Trustworthy, straightforward, and built to endure, it supports precise decisions from first article through final production.