The JBO Thread Plug Gauge is a precise UNC Go-No/Go tool designed for right-hand 1/2 x 13 threads with a 3B tolerance. It’s ideal for inspecting threaded holes across manufacturing, automotive, and aerospace applications, ensuring they conform to Unified thread standards.

With its go/no-go design, inspectors can quickly confirm whether a hole meets specification or requires adjustment, helping achieve consistent fits and reliable performance in busy production environments.

• Go/No-Go quick acceptance: Instantly determine if a hole is within spec for 1/2 x 13 UNC right-hand threads, speeding inspections and reducing guesswork.
• Precise 3B UNC 1/2 x 13 calibration: Calibrated to Unified thread standards to deliver repeatable, reliable pass/fail results for critical assemblies.
• Rugged, knurled construction: Durable, easy-to-grip gauge built for daily shop use, resisting wear and maintaining accurate checks over time.

Using this gauge helps you streamline quality control, minimize rework, and ensure consistent thread engagement across parts. It supports faster setups, reduces downtime on the line, and gives engineers, buyers, and technicians confidence that threaded holes will perform as designed in the final product.