The JBO Thread Plug Gauge is a precision tool designed to quickly verify UNEF threaded holes, delivering reliable go/no-go feedback for left-hand threads in 2B tolerance. It’s ideal for manufacturers, automotive, and aerospace applications, helping inspectors and machinists confirm thread conformity with minimal downtime and clear pass/fail results.

• Go/No-Go quick conformance checks: Instantly determine whether a threaded hole passes or fails the UNEF go/no-go criteria, reducing inspection time and eliminating guesswork on the shop floor.
• Left-Hand UNEF 2B compatibility: Precisely engineered for left-hand threads in 2B tolerance, ensuring reliable checks for left-handed components and consistent fit across assemblies.
• Durable, knurled construction: Rugged metal body with a textured knurl provides secure handling and long life in busy workshop environments, even with frequent use.

This gauge helps streamline your inspection workflow, enabling faster decisions, fewer reworks, and more consistent thread quality across batches. By delivering clear pass/fail results, it supports reliable assembly and helps you meet production deadlines while maintaining compliance with Unified thread standards.