The JBO Thread Plug Gauge is a precision inspection tool designed to quickly and reliably verify BSF threads in holes and mating parts. Its Go-No-Go design delivers an at-a-glance verdict on whether a thread conforms to the 7/16 x 18 right-hand, medium class standard, helping you speed up quality checks and reduce rework.

Designed for a wide range of users—from engineers and inspectors to machinists and repair technicians—the gauge is ideal for manufacturing, automotive, and aerospace environments. It supports consistent thread verification on threaded holes and components, ensuring proper fitment and reliable performance in assemblies.

• Go/No-Go clarity: Quick pass/fail checks let you identify conforming and non-conforming threads at a glance, cutting inspection time and avoiding guesswork.
• Precise BSF 7/16 x 18 Right-Hand, Medium Class: Calibrated to the exact size and class needed for reliable, repeatable thread verification across parts and batches.
• Durable, user-friendly construction: Rugged knurled body and solid threaded ends provide comfortable handling and long service life in demanding shop environments.

Using the JBO Thread Plug Gauge helps streamline your inspection workflow, reduces downtime from misfits, and supports consistent performance in assemblies where correct thread engagement is critical.