The JBO UNC Go-No-Go Thread Plug Gauge is a precision inspection tool designed to verify 9/16-12 UNC threaded holes quickly and reliably. Built for manufacturers, automotive teams, and aerospace shops, it helps ensure threaded components meet Unified Thread Standard class 3B requirements. With its go/no-go design, technicians can instantly confirm fit and identify out-of-tolerance holes, reducing guesswork and rework.

• Go/No-Go quick check: Easily determine pass/fail for 9/16-12 UNC Class 3B threads, speeding inspections and reducing guesswork.
• Durable, ergonomic construction: Hardened steel body with a knurled grip and color-coded collars for secure handling and long service life in busy shops.
• Right-hand UNC 9/16-12 Class 3B sizing: Precisely calibrated to the Unified Thread Standard, delivering consistent measurements across parts and suppliers.

This plug gauge strengthens quality control by providing fast, reliable confirmation of thread readiness, helping you avoid misfits and costly rework. Its robust build withstands daily use on demanding shop floors, while clear wear indicators support routine calibration and traceability in QC records. Incorporate this gauge into your inspection workflow to save time, improve part-to-part consistency, and ensure dependable performance in assemblies.