The JBO Thread Plug Gauge is a precision tool designed to quickly verify UNF threads in threaded holes and components. Targeted at professionals in manufacturing, automotive, and aerospace, it helps quality teams confirm that holes meet the Unified thread standard with dependable Go/No-Go checks. This left-hand gauge is sized for 5/16 x 24 and built to the 2B specification, delivering reliable, repeatable results in demanding shop environments.

Designed for fast, visual checks, the Go/No-Go ends let inspectors instantly distinguish conforming from non-conforming threads, reducing guesswork and speeding up inspections. The tool's compact, dual-end design and knurled body provide a secure grip and precise handling during routine measurements.

• Go/No-Go quick verification: Instantly identify whether UNF 5/16 x 24 threads meet specification, reducing inspection time and preventing misfits.
• Left-hand UNF 5/16 x 24 compatibility: Specifically designed for left-hand threaded holes, helping you avoid mix-ups and ensure correct assembly.
• Ergonomic, durable construction: Knurled grip and precision ends enable secure handling and repeatable measurements in busy workshop environments.

With the JBO Thread Plug Gauge, you can streamline your threaded-hole inspections, reduce rework, and protect overall product quality. Its precise dimensions and Go/No-Go design support faster QA checks, consistent results, and confidence that assemblies will fit as intended—every time you use it.