The JBO Plug Gauge is a precision gage designed to verify metric screw thread inserts (STIs). With a right-hand orientation, 6H tolerance, and an M3 x 0.5 size, it provides quick, accurate checks for inserts used in manufacturing, automotive, and aerospace. Calibrated with DAkkS traceability, this gauge delivers measurements that are directly linked to national standards for reliable quality control.

Manufactured and assessed in accordance with ANSI/ASME thread standards, these plug gauges are built to support repeatable inspections of metric STI inserts across high-demand production environments.

• DAkkS-calibrated for traceable accuracy: The plug gauge carries formal calibration that links measurements to national standards, helping you demonstrate inspection credibility and pass audits.
• Metric STI size — M3 x 0.5: Precisely checks metric screw thread inserts to confirm correct engagement and seating, reducing guesswork and rework.
• Right-hand orientation with knurled grip: Designed for easy, repeatable measurements in common inspection workflows, improving speed and consistency.

Used across industries, this gauge streamlines quality checks, speeds up assembly and repair tasks, and delivers auditable, reliable results that support compliance and customer satisfaction in manufacturing, automotive, and aerospace environments.