The JBO Plug Gauge - UNC (STI) Right Hand - 2B - No. 12 x 24 is a calibrated plug gauge designed to inspect UNC thread inserts (STIs). Built to ANSI/ASME standards, it provides precise pitch-diameter measurements to verify that inserts meet UNC STI specifications.

Designed for manufacturing, automotive, and aerospace environments, this tool supports efficient QA checks, reduces rework, and helps maintain consistent performance across assemblies.

• DAkkS-calibrated, traceable accuracy: Ensures measurement results are auditable and accepted in quality systems, with calibration documentation for traceability.
• UNC (STI) compatibility for precise pitch-diameter checks: Accurately verify the fit and function of screw-thread inserts, preventing misfits and binding in assemblies.
• Rugged, user-friendly design for reliable use: Durable construction with knurled grip and robust ends enables repeatable checks in busy production environments, reducing downtime.

This plug gauge helps you make confident, repeatable inspections, streamlining quality control and ensuring every UNC STI insert performs as intended. With 2B tolerance and Right-Hand orientation, you’ll achieve consistent results across batches, while the DAkkS calibration provides the traceability required for audits and ISO-compliant workflows.