The JBO Thread Plug Gauge is a precise UNF Go-No/Go gauge designed for left-handed threads, specifically configured for 3/8 x 24 with a 2B tolerance. It’s an essential tool for inspectors, machinists, and quality engineers who need fast, reliable verification of threaded holes to ensure proper fit and function in manufacturing, automotive, and aerospace applications.

• Go/No-Go Quick Verification: Instantly identify conforming versus non-conforming left-hand UNF threads, enabling fast quality checks and reducing production downtime.
• Left-Hand UNF 3/8 x 24 Compatibility: Precisely calibrated to the 3/8 x 24 left-hand thread size, ensuring accurate assessment of hole acceptance and proper assembly readiness.
• Durable, Easy-to-Use Design: Features a knurled body for secure grip and straightforward alignment, delivering repeatable measurements in busy shop environments.

Using the JBO Thread Plug Gauge simplifies threaded-hole inspection, helping you maintain consistent results, speed up QC cycles, and avoid misfits in critical assemblies. It provides clear go/no-go feedback that supports tighter process control and reliable overall performance across your production line.