The JBO Plug Gauge - Metric (STI) is a precision tool designed to verify metric-sized screw thread inserts (STIs). It’s ideal for engineers, manufacturers, inspectors, and shop-floor technicians who need fast, reliable checks to confirm inserts meet exact metric STI standards and specifications.

This gauge is manufactured and assessed to ANSI/ASME thread system standards and is calibrated with DAkkS calibration. It features a right-hand configuration for M18 x 2.5 inserts with a 6H tolerance, enabling accurate, repeatable inspections in production, quality control, and maintenance workflows.

• DAkkS-calibrated for traceable accuracy: provides auditable, high-precision measurements you can trust across batches and audits.
• Metric STI compatibility (M18 x 2.5, 6H, right-hand): ensures consistent go/no-go verification of standard metric thread inserts and their installation performance.
• Rugged, user-friendly design: knurled body with durable end fittings delivers secure handling and long service life in busy workshop environments.

Use this plug gauge to streamline quality checks, reduce rework, and maintain consistent, compliant insert installations across manufacturing, automotive, and aerospace applications. Its calibrated accuracy helps you make confident pass/fail decisions, save time on inspection, and uphold reliable performance in demanding environments.