The JBO Thread Plug Gauge (UNJF Go-No/Go, Right Hand, 3B, No. 4 x 48) is a precision inspection tool designed to verify threaded holes against Unified thread standards with speed and reliability. Built for manufacturing, automotive, and aerospace environments, this gauge helps quality teams quickly confirm that holes meet specification and are ready for assembly.

• Go/No-Go quick assessment: Quickly determine if threaded holes conform to UNJF standards, speeding inspections and clearly signaling conforming vs. non-conforming threads.
• UNJF sizing with 3B tolerance: Provides repeatable, accurate checks by aligning with Class 3B tolerance for UNJF threads, reducing variation across parts and operators.
• Dual-end design with knurled grip: Enables efficient go and no-go checks in a single tool while offering a secure, comfortable grip for precise handling on busy shop floors.

This gauge delivers dependable performance in daily quality control workflows, helping engineers, buyers, and technicians confirm proper fitment and reliable function of threaded components—ultimately reducing rework, downtime, and assembly risk.