The JBO Thread Plug Gauge is a UNC Go-No/Go right-hand gauge designed to verify threaded holes quickly and reliably. Sized for 5/16 x 18 threads, it helps inspectors, machinists, and quality teams confirm that holes meet Unified thread standards with confidence. Its go/no-go design streamlines your QA workflow, making it easy to spot non-conforming parts and prevent improper assemblies.

• Go/No-Go design for quick pass/fail checks: Instantly identify conforming vs non-conforming threads so you can make fast, informed decisions and reduce inspection time.
• Right-hand UNC 5/16 x 18 thread: Precisely matches standard hole threads used in a wide range of applications, ensuring reliable, consistent checks across parts.
• 3B tolerance for consistent measurements: Delivers repeatable, accurate gauge readings that help prevent misfits and support compliant, high-quality production.

Used in manufacturing, automotive, and aerospace environments, this gauge improves workflow by delivering dependable thread verification that supports proper fitment and durable performance in assemblies. With its precise dimensions and standardized UNC form, you can trust it to provide clear, actionable results during both incoming and in-process inspections, helping you reduce downtime and maintain quality across batches.