The JBO Plug Gauge is a precision metric plug gauge designed for testing metric-sized screw thread inserts (STIs). Built for right-hand STI inserts, this gauge provides fast, go/no-go checks to confirm inserts meet exact 6H specifications and the M18 x 1.5 size. It's ideal for engineering shops, manufacturers, automotive service centers, and aerospace maintenance teams that rely on consistent insert dimensions for reliable assembly and performance.

Calibrated with DAkkS traceability and manufactured to ANSI/ASME thread standards, the gauge delivers repeatable measurements you can trust across audits and process improvements. The rugged, knurled body withstands daily use in busy production environments, helping you reduce rework and avoid missed tolerances.

• DAkkS-calibrated, traceable accuracy: Ensures measurements carry international calibration traceability for consistent results across audits and production runs.
• Metric STI compatibility (M18 x 1.5, 6H): Precisely sized to metric Screw Thread Inserts, enabling quick go/no-go checks to verify insert dimensions.
• Rugged, right-hand design with knurled grip: Built for fast, repeatable checks in busy environments, combining durability with easy handling for reliable inspections.

With the JBO Plug Gauge in your inspection toolkit, you’ll speed up quality checks, reduce downtime due to misfits, and ensure consistent performance across batches. The combination of DAkkS calibration, ANSI/ASME-compliant dimensions, and a purpose-built right-hand design gives you confidence in every measurement, helping you maintain tight tolerances and deliver reliable results in manufacturing, maintenance, and quality control workflows.