The JBO Thread Plug Gauge is a Go/No-Go inspection tool designed to verify metric fine-threaded holes. It’s ideal for machinists, assembly teams, and maintenance technicians who need fast, confident checks to ensure components fit together precisely.

Built for durability, this gauge features a hardened steel construction with a textured knurled body for a secure grip in any workshop environment. Its Go/No-Go design provides quick, at-a-glance verification of thread acceptance, helping you speed up quality checks and reduce guesswork during assembly.

• Fast Go/No-Go checks: Quickly confirm whether internal threads meet the required limits, speeding up inspections and reducing downtime.
• Metric fine-thread precision (M38 x 1, Right-Hand, 4H): Calibrated to standard metric fine threads to ensure consistent fits with mating parts and reliable results across production runs.
• Durable hardened steel with knurled grip: Built to endure daily use, resist wear, and provide a secure, comfortable grip even in oily or gloved conditions.

Use this gauge to streamline quality control, ensure reliable thread engagement, and maintain consistent performance across parts and assemblies. Its robust construction and precise Go/No-Go functionality help you make confident, efficient decisions during production and maintenance workloads.