The JBO UNC Thread Plug Gauge is a precision Go-No/Go inspection tool designed for manufacturing, automotive, and aerospace environments. Sized for a 1 3/8 in nominal diameter and 6 in overall length, it confirms right-hand UNC threaded holes against Unified thread standards with fast, decisive results.

Sized for 1 3/8 in nominal diameter and 6 in length, and built to a 2B tolerance, this gauge delivers reliable, repeatable results and supports quick pass/fail decisions in busy shops.

• Go/No-Go quick checks for right-hand UNC threads: Instantly confirm whether a threaded hole meets the exact size and class, speeding inspection and reducing guesswork.
• Precise 1 3/8 in x 6 in size with 2B tolerance: Ensures consistent conformance to Unified standards, enabling reliable comparisons across parts and batches.
• Rugged, ergonomic construction for repeated use: Knurled grip and robust fittings provide secure handling in busy workshops and long tool life.

This gauge helps you streamline inspection workflows, reduce downtime, and improve overall quality by delivering repeatable, go/no-go verified results every time. It’s a dependable choice for shops that need fast, accurate thread checks and confident decision-making in manufacturing, automotive, and aerospace environments.