The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, ideal for quality control and assembly where exact thread engagement matters. Specifically built for left-hand M36 x 3 holes, its Go/No-Go design lets you quickly verify tolerance and ensure reliable mating with the corresponding component.

• Go/No-Go verification for fast checks: Quickly determine whether a threaded hole is within tolerance, reducing guesswork and downtime during assembly or quality control.
• Metric fine thread compatibility (M36 x 3) with left-hand design: Calibrated for metric fine threads and left-hand orientation, providing accurate checks for holes that require this specific threading.
• Durable hardened steel construction with 6H tolerance: Built to resist wear in busy workshops, maintaining long-term accuracy and reliability across many measurements.

Used in machining, assembly, and inspection workflows, this gauge helps you streamline quality checks, improve consistency across parts, and cut down on rework. The rugged, knurled body and precisely finished ends deliver repeatable results in tight spaces, so you can trust every measurement and move forward with confidence.