The JBO UNC (STI) Plug Gauge is a precision measuring tool designed to verify the pitch diameter of UNC screw-thread inserts used in Helicoil systems. It’s ideal for manufacturers, automotive shops, aerospace QA teams, and workshop technicians who need fast, reliable checks that ensure inserts fit and perform as intended.

Manufactured and assessed in accordance with ANSI/ASME thread standards, this Right Hand gauge is sized No. 6 x 32, 2B, and calibrated to DAkkS standards to provide traceable measurement data for quality control and audits.

• DAkkS calibrated for traceable accuracy: Ensures documented, audit-ready measurements that support quality control and compliance.
• UNC (STI) compatibility for precise pitch diameter checks: Specifically designed for UNC STI wire inserts, enabling quick, repeatable measurement of pitch diameter to guarantee proper engagement.
• Durable, ergonomic knurled body with secure end fittings: Built to withstand busy shop environments; the knurled surface and solid end fittings provide reliable handling and long service life.

In use, the JBO UNC (STI) Plug Gauge streamlines inspection workflows by delivering fast, dependable pitch-diameter verification, ensuring proper engagement and seating of UNC STI Helicoil inserts, which helps reduce deviations and rework. With DAkkS calibration and ANSI/ASME compliance, you gain confidence for audits and consistent, high-quality results across manufacturing, automotive, and aerospace applications.