The JBO Plug Gauge - UNC (STI) Right Hand - 3B - No. 4 x 40 - Calibrated (DAkkS Calibration) is a precision measurement tool designed for UNC screw thread inserts (STIs). These Helicoil gauges are manufactured and assessed in accordance with ANSI/ASME thread standards, delivering reliable checks in manufacturing, automotive, and aerospace environments. Built for right-hand UNC STI inserts, this gauge helps verify pitch diameter and conformity quickly and consistently, supporting tight tolerances on critical assemblies.

• DAkkS-calibrated accuracy: This gauge is calibrated to DAkkS standards, providing traceable, documented measurements that support quality control, audits, and supplier qualification.
• Precisely sized for UNC STI inserts (No. 4 x 40, right-hand): Matched to standard UNC STI threads with a right-hand orientation, enabling fast, reliable pitch-diameter checks and clear pass/fail decisions on the line.
• Durable, easy-to-handle knurled design: Robust construction with a textured grip ensures secure use in busy workshops, delivering repeatable measurements with minimal slips or fatigue.

Using this gauge helps streamline inspection workflows, reduces rework from improper insert fits, and provides trustworthy, calibration-backed results that enhance overall quality and consistency across production and assembly processes.