The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. This left-hand Go/No-Go gauge targets M22 x 1 holes, enabling quick, confident checks to verify hole tolerances in the 6H class.

Built from hardened steel, it stands up to daily workshop use, delivering long life and consistent performance even in busy production environments.

• Go/No-Go quick checks: Quickly confirm if the hole is within tolerance with a simple go/no-go test, reducing inspection time and guesswork.
• Metric fine-thread precision (M22 x 1, 6H): Engineered for metric fine threads to ensure accurate gauging and reliable mating with compatible parts.
• Left-hand design in hardened steel: Optimized for inspecting left-hand threaded holes and built to resist wear for durable, repeated use.

Used on the shop floor or in quality labs, this gauge streamlines assembly checks and quality control by providing fast, repeatable assessments. It minimizes downtime, reduces rework, and supports consistent results across batches, giving you confidence in every threaded connection.