The JBO Thread Plug Gauge is a precision UNC go-no-go gauge designed for fast, reliable inspection of threaded holes. Built for demanding environments like manufacturing, automotive, and aerospace, it verifies a 7/8-9 UNC thread hole meets Unified thread standards. The right-hand orientation aligns with common UNC threads, making it intuitive for inspectors and machinists alike.

With its dual-ended go/no-go design, you get a clear pass/fail result in seconds. The gauge features a robust knurled body for secure handling and quick, repeated checks, helping maintain high-quality fits across your production line.

• Go/No-Go verification at a glance: Quickly determine if a thread hole is within tolerance by testing both limits, reducing inspection time and rework.
• Precise 7/8-9 UNC, 2B tolerance: Matches the Unified thread standard for repeatable, consistent checks across parts and batches.
• Durable, ergonomic design: Knurled grip and dual-ended threaded ends with color-coded collars provide comfortable handling and easy orientation in busy workshops.

This gauge helps streamline quality assurance by delivering reliable, quick confirmations of thread conformity, supporting faster workflows, fewer defects, and improved overall accuracy in threaded assemblies.