The JBO UNC Go-No/Go Thread Plug Gauge is a precision tool designed to quickly verify internal threads in holes and components. Built for a wide range of applications—from manufacturing lines to automotive maintenance and aerospace QC—this gauge helps ensure threaded openings meet Unified thread standards with reliable, repeatable results.

This right-hand gauge is sized for 5/8 x 11 UNC and 3B class tolerances. Its go/no-go design provides an instant pass/fail indication, so inspectors can confirm proper engagement and fit without guesswork, reducing rework and downtime.

• Go/No-Go quick check: A clear go/no-go design lets you quickly confirm whether the threaded hole meets the specification—speeding up QC and minimizing rework.
• Accurate UNC 5/8-11 right-hand threading: Precisely engineered to the 5/8-11 UNC standard with right-hand orientation, ensuring consistent seating and reliable dimension verification across parts.
• Rugged, user-friendly construction: Durable, easy-to-handle design with a knurled grip for stable handling in busy workshops and on the production line.

Used across manufacturing, automotive, and aerospace settings, the JBO Thread Plug Gauge helps you streamline inspections, improve first-pass yields, and ensure threaded components fit correctly in assemblies. It’s a dependable addition to any quality-control toolkit, delivering clear results and peace of mind in every check.