JBO Thread Plug Gauge – UNC Go-No/Go – Left Hand – 2B – 9/16 x 12 is a precision gauge used to verify internal threads to Unified standards in manufacturing, automotive, and aerospace environments. Its go/no-go design delivers fast pass/fail feedback for right-fit, reliable assemblies.

• Go/No-Go Quick Conformity Check: The dual-ended design lets you quickly confirm thread-hole acceptance—if the go end threads in smoothly and the no-go end does not, the hole is within tolerance, accelerating inspections and reducing guesswork.
• Left-Hand UNC Size 9/16 x 12, 2B: Precisely sized for left-hand Unified threads, providing accurate hole validation and consistent results for applications requiring left-handed fasteners.
• Industrial-Grade Reliability: Specifically suited for manufacturing, automotive, and aerospace inspection workflows, delivering clear, repeatable readings that support quality control and proper fitment.

This plug gauge helps you streamline quality checks, improve part-to-part consistency, and prevent mismatches in assemblies. By delivering reliable go/no-go readings with exact sizing, it supports faster setup, fewer reworks, and higher overall performance across your threaded components.