The JBO Plug Gauge - Metric Fine (STI) Helicoil Gauge is a precision inspection tool designed for metric screw thread inserts (STIs). Built for right-hand M10 x 1.25 STI inserts, it enables quick, reliable go/no-go checks to support tight quality control on production lines, maintenance shops, and engineering labs.

Manufactured and assessed to ANSI/ASME thread standards, this gauge carries DAkkS-calibrated measurements for traceable accuracy. That means you can trust every check to reflect true insert dimensions, helping you maintain consistent performance across automotive, aerospace, and general manufacturing applications.

• DAkkS-Traceable Calibration: Provides documented, national-standard traceability for accurate, audit-ready measurements of each insert.
• Precise Metric STI Fit (M10 x 1.25, 6H, Right-Hand): Delivers dependable size verification aligned with industry STI standards to reduce guesswork and rejects.
• Rugged, User-Friendly Construction: Knurled, durable body with corrosion-resistant materials for reliable, daily use in busy shop environments.

By delivering consistent, accurate checks, the JBO Plug Gauge helps you speed up quality control, minimize downtime from incorrect inserts, and ensure every STI meets specification from assembly through final inspection. This calibrated tool reduces rework, improves part consistency, and provides confidence across engineering, manufacturing, and maintenance teams.