The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for accurately verifying internal UNC threads. It's an essential instrument for machinists, inspectors, and quality teams in manufacturing, automotive, and aerospace environments. Use it to quickly confirm that threaded holes meet the Unified Thread Standard and to spot non-conforming parts before assembly.

Sized No. 2 x 56, with a right-hand UNC thread and 2B internal-thread class, this gauge is built for reliable, repeatable checks. The rugged knurled body provides a secure grip in busy workstations, and the Go/No-Go design delivers clear, fast pass/fail feedback to streamline inspections and reduce rework.

• Go/No-Go end design: enables rapid, definitive checks—Go confirms acceptable threads, while No-Go flags non-conforming holes, speeding up quality decisions.
• UNC right-hand, 2B class specification: engineered to match standard internal threads, ensuring consistent measurements and reliable fit across parts.
• Durable knurled construction: robust, easy-to-grip body that stands up to daily use in demanding shop environments and provides precise handling.

Using the JBO Thread Plug Gauge helps you accelerate setup and inspection, maintain consistent thread quality across components, and reduce downtime by catching mismatches before they become costly rework or field failures.