The JBO Thread Plug Gauge (GO) - Metric Coarse - Left Hand - 6H - M48 x 5 is a precision inspection tool designed to verify the size and condition of metric coarse threaded holes. It is ideal for engineers, machinists, quality control professionals, and workshop technicians who need a reliable GO gauge to ensure components meet the required thread standards.

Built to endure demanding shop environments, this gauge features hardened steel construction for long-lasting wear resistance. Its precise design supports fast, repeatable measurements, helping teams accelerate inspections, reduce rework, and maintain consistent fitment across production runs.

• Accurate metric coarse GO gauge: Delivers precise checks for M48 x 5 coarse threads, enabling quick confirmation of hole size against standards and reducing guesswork.
• Durable hardened steel construction: Withstands daily use in busy workshops while maintaining measurement accuracy over time.
• Left Hand, 6H compatibility: Specifically designed to suit left-hand metric coarse threads and the 6H tolerance class for reliable engagement and results.

Together, these features help streamline quality control and precision assembly, delivering consistent results, faster inspections, and greater confidence that threaded connections will perform as intended in the final product.