The JBO Thread Plug Gauge – UNC Go-No/Go – Left Hand – 2B – 1 1/8 x 7 is a precision inspection tool designed to verify UNC threaded holes with quick, reliable checks. It’s ideal for manufacturers, automotive shops, and aerospace maintenance teams that rely on accurate fits and consistent performance.

Its go/no-go design lets inspectors instantly distinguish conforming from non-conforming threads, helping you speed up quality checks and reduce rework.

• Go/No-Go quick pass/fail checks: Quickly determine whether the hole meets the specified UNC thread dimensions, reducing inspection time and eliminating guesswork.
• Left-hand thread compatibility: Specifically calibrated for left-hand threads, ensuring accurate verification where standard gauges may miss orientation.
• Precise 1 1/8 x 7 UNC, 2B tolerance: Conforms to Unified thread standards for reliable measurements, supporting consistent quality across parts and assemblies.

With its precise calibration and straightforward use, this gauge helps you maintain tight tolerances, streamline QA workflows, and minimize production downtime. By providing clear pass/fail results, it empowers teams to make confident decisions during inspection and assembly, delivering reliable performance across manufacturing, automotive, and aerospace applications.