The JBO Thread Plug Gauge is a precision go/no-go gauge designed for quick, reliable verification of internal threads. Specifically matched to BSW 1/4 x 20 right-hand threads in a medium class tolerance, this tool is ideal for quality control in manufacturing, automotive, and aerospace environments. It helps technicians, inspectors, and machinists confirm thread readiness and correct fitment with confidence.

With its Go/No-Go design, you get fast, unambiguous pass/fail results—cutting inspection time and reducing guesswork. The gauge is sized for standard BSW threads (1/4 x 20, right-hand), ensuring compatibility with common components and taps. The medium class tolerance provides consistent, repeatable measurements across parts and production runs.

• Go/No-Go quick checks: Delivers fast, reliable pass/fail verification of internal threads, speeding quality checks and reducing rework.
• BSW 1/4 x 20 right-hand thread: Precisely matched to standard BSW threads for accurate evaluation of threaded holes and compatibility with common fasteners.
• Medium class tolerance: Provides consistent, repeatable measurements across batches, minimizing false rejects while maintaining thread integrity.

Using the JBO Thread Plug Gauge helps streamline inspection workflows, shorten setup and assembly times, and improve overall threading quality. It supports reliable results across production runs and helps identify tooling or tapping issues early, protecting uptime and ensuring dependable performance in critical applications.