The JBO Thread Plug Gauge is a precision inspection tool designed to verify UNC threaded holes with speed and reliability. Sized for right-hand 3/8 x 16 threads and built to 3B class tolerance, it’s ideal for manufacturing, automotive, and aerospace environments where accurate hole qualification is essential.

The go/no-go design provides immediate pass/fail feedback on whether a hole conforms to standard thread dimensions, helping you speed up inspections and reduce rework. This simple, repeatable check keeps quality control consistent across production runs.

• Go/No-Go Verification: Instantly determine if a threaded hole meets UNC 3/8 x 16 standards, delivering clear pass/fail results to speed up quality checks and minimize guesswork.
• Precise UNC 3/8 x 16, 3B Class: Calibrated to the standard thread size and tolerance, ensuring reliable compatibility with common fasteners and assemblies in your workflow.
• Durable, Ergonomic Design: Knurled, robust body with dual-thread ends provides a secure grip and repeatable testing in busy shop environments, enhancing accuracy over time.

With its reliable construction and straightforward operation, the JBO Thread Plug Gauge helps you streamline thread inspection, improve first-pass results, and maintain tight quality control across your manufacturing or maintenance processes.