The JBO Thread Plug Gauge (GO) in Metric Fine, Left Hand, 6H for M78 x 1.5 is a precision inspection tool designed to quickly and reliably verify threaded holes. It’s ideal for engineers, machinists, quality teams, and shop-floor technicians who need to confirm metric left-hand threads meet exact standards during assembly, machining, or quality checks.

Crafted from hardened steel, this GO gauge delivers durable, wear-resistant performance in demanding environments. Its metric fine specification, left-hand orientation, and 6H tolerance ensure consistent, repeatable checks across production runs, helping you maintain tight quality control with confidence.

• Precise GO gauge for metric fine threads: Quickly confirms acceptance of M78 x 1.5 left-hand holes, enabling fast, go/no-go checks and supporting first-pass quality during assembly and inspection.
• Durable hardened steel construction: Built to endure daily use, resisting wear and corrosion so accuracy remains consistent through long service life and repeated inspections.
• Left-hand compatibility and 6H tolerance: Specifically calibrated for left-hand threaded holes, ensuring reliable, repeatable measurements and reducing misreads across parts and tools.

In practice, this gauge streamlines your inspection workflow, helping you spot threading issues before they impact assembly or performance. Its rugged construction and precise standards translate to faster setup, fewer reworks, and more predictable results, giving you the confidence to maintain high-quality outputs across projects.