The JBO Thread Plug Gauge is a precision two-ended tool designed to verify internal UNF threads in holes and components. It’s built for professionals across manufacturing, automotive, and aerospace environments who need quick, reliable thread checks. The go/no-go design provides a clear pass/fail indication, helping you confirm proper fit and function before assemblies move forward.

Designed for right-hand UNF threads in the 9/16 x 18 size with Class 3B tolerance, this gauge delivers consistent, repeatable results. The rugged knurled body ensures a secure grip in busy shops, while the color-coded ends help with fast orientation and reduced setup time.

• Two-ended Go/No-Go design for fast verification: One end confirms the hole accepts a true Go measurement while the other end blocks acceptance with a No-Go check, delivering clear pass/fail results in seconds and minimizing guesswork.
• Accurate UNF 9/16 x 18 right-hand, Class 3B specification: Precisely matched to Unified Thread Standards to ensure reliable checks against standard threaded parts and consistent tooling alignment across operators.
• Durable knurled body with color-coded ends: Sturdy construction stands up to daily shop use, while the textured grip and color cues speed setup and reduce handling errors in demanding environments.

Using the JBO Thread Plug Gauge helps streamline quality checks, reduce inspection downtime, and improve overall thread acceptance rates. It supports faster throughput without compromising accuracy, making it a dependable choice for QA teams, machinists, and assembly technicians who demand precise, repeatable results.