The JBO Plug Gauge - UNC (STI) Heli Coil Gauge - Right Hand - 3B - No. 6 x 32 - Calibrated (DAkkS Calibration) is a precision plug gauge designed for UNC (Unified National Coarse) screw thread inserts (STIs). Manufactured and assessed to ANSI/ASME thread standards, this gauge provides accurate pitch-diameter verification to ensure inserts seat correctly and perform reliably in assemblies. With a right-hand orientation and 3B classification, it is tailored for standard STI insert inspections and No. 6 x 32 sizes.

• DAkkS-calibrated accuracy: Provides traceable measurements for UNC STI insert checks, helping you confidently accept or reject parts and maintain quality across production runs.
• Rugged, right-hand design: Knurled, durable body and robust ends are built to withstand daily shop use, delivering repeatable readings and easy handling.
• No. 6 x 32 UNC STI sizing (3B): Precisely matched to No. 6 x 32 inserts in the 3B class, enabling accurate pitch-diameter checks and reliable fit verification.

Together, the JBO UNC (STI) plug gauge helps streamline inspection workflows, reduces rework, and reinforces confidence that every insert meets specification before it goes into assembly. With ANSI/ASME-aligned measurements, DAkkS calibration, and a robust design, it’s a dependable choice for engineers, buyers, and technicians who demand precise, repeatable results from every check.