The JBO Thread Plug Gauge is a precision Go/No-Go tool designed specifically for metric coarse threads. with right-hand orientation and a 5H specification, this gauge helps machinists, quality inspectors, and assembly teams quickly verify threaded holes meet standard coarse-thread tolerances for M1.4 x 0.3. Built for reliable use, it’s ideal for shops, classrooms, and fieldwork where consistent threading checks are essential.

• Go/No-Go Design for Fast, Reliable Checks: Quickly verify hole acceptance—use the go end for a correct fit and the no-go end to catch out-of-tolerance threads, reducing inspection time and guesswork.
• Durable Hardened Steel Construction: Engineered to withstand rigorous use, providing stable, long-lasting measurements in busy workshop environments.
• Right Hand 5H Class for Metric Coarse Threads: Aligns with standard coarse-thread specifications for M1.4 x 0.3, delivering consistent, repeatable results across jobs.

This plug gauge helps streamline quality checks, ensuring threaded holes accept components only when within the specified tolerance. Its robust construction, combined with the go/no-go logic, supports faster setup, fewer reworks, and more consistent performance across assemblies—boosting productivity and confidence in your manufacturing or machining workflow.