The JBO Thread Plug Gauge is a precision Go-No-Go gauge built to verify UNF threaded holes quickly and reliably. It's ideal for production lines, repair shops, and quality teams in manufacturing, automotive, and aerospace environments where correct thread engagement matters for fit and function.

With its left-hand UNF configuration, 1 1/8 x 12 size, and 2B tolerance, this gauge provides clear pass/fail indication you can trust during routine inspections, avoiding guesswork and costly rework.

• Go/No-Go quick checks: Instantly confirm whether an internal thread meets specification, enabling fast decisions and steady workflow without lengthy measurements.
• Left-hand UNF compatibility: Precisely designed for left-hand threads at 1 1/8 x 12 with 2B tolerance, ensuring correct identification of compliant holes and preventing assembly mismatches.
• Durable, user-friendly construction: Knurled, corrosion-resistant body and robust interfaces provide a secure grip and long service life in busy shop environments.

Using the JBO Thread Plug Gauge helps streamline quality assurance, reduce downtime, and improve repeatable results across parts and assemblies. Its straightforward pass/fail feedback supports faster inspections, better traceability, and higher confidence when delivering components to customers or downstream processes. Built for dependable performance in demanding settings, this gauge is a reliable addition to any gauge room or shop floor toolkit.