The JBO Thread Plug Gauge is a UNC Go-No/Go right-hand thread gauge sized for 9/16 x 12 with a 2B tolerance. Designed for quick, reliable inspection of threaded holes and mating parts, it helps ensure components meet Unified thread standards without slowing down production. Its precise design supports use across manufacturing, automotive, and aerospace environments, making quality checks straightforward for technicians and inspectors alike.

• Go/No-Go UNC threading verification: Quickly determine whether a hole or threaded component conforms to the 9/16 x 12 UNC standard, giving clear pass/fail results to speed up inspections and ensure proper fitment.
• Dual-ended, go and no-go ends: One end tests the GO limit while the other tests the NO-GO limit, enabling fast, repeatable checks with a single, versatile tool.
• Ergonomic, durable construction with 2B tolerance: Built for daily shop use with a comfortable grip and dependable measurements that translate into reliable, consistent results across production runs.

This gauge helps streamline your quality workflow by enabling rapid thread verification on the shop floor, reducing rework and scrap, and supporting consistent mating with fasteners and threaded components. Whether you’re on a manufacturing line, in an automotive service setting, or working in aerospace maintenance, the JBO UNC thread plug gauge delivers dependable performance, straightforward use, and the confidence you need to keep projects moving smoothly.