The JBO Thread Plug Gauge is a precision inspection tool designed to quickly verify UNF threaded holes. Ideal for manufacturers, assemblers, and maintenance teams across automotive, aerospace, and general engineering, it helps ensure that internal threads meet Unified standards with reliable, repeatable results. This right-hand, 3B class gauge is sized No. 5 x 44, making it a focused solution for common UNF hole inspections and fitment checks.

• Go/No-Go design for quick conformance checks: Speeds up quality control by instantly showing whether threads are within tolerance. Use the go side to confirm acceptable holes and the no-go side to catch out-of-tolerance features, reducing guesswork and rework.
• Precise UNF 3B, Right-Hand sizing (No. 5 x 44): Specifically engineered to verify UNF thread holes against exact internal thread parameters, ensuring reliable fit and interchangeability across parts and assemblies.
• Durable, user-friendly construction: Built for repeated use in busy shops and production lines. The knurled body and dual-end threading provide secure handling and easy alignment during inspections, even with gloves on.

Using the JBO Thread Plug Gauge helps you streamline threaded-hole inspections, improve seating reliability for fasteners, and maintain consistent quality across your manufacturing workflow. With clear go/no-go results and a robust, easy-to-handle design, you can trust it to support efficient, accurate checks from first article to final assembly.