The JBO Thread Plug Gauge (GO) - Metric Fine - Left Hand - 6H - M52 x 2 is a precision inspection tool designed to verify threaded holes meet exact size and pitch requirements. It is ideal for machinists, quality control technicians, maintenance teams, and fabricators, helping you quickly confirm whether a tapped hole is within the required specification.

Built from hardened steel for long-lasting performance, this GO gauge is engineered to withstand daily shop-floor use. Its metric fine thread specification (M52 x 2) and left-hand orientation ensure accurate checks for left-handed threaded components, while the knurled body provides a secure grip for easy handling in tight spaces.

• Precise metric GO sizing (M52 x 2): Calibrated to the M52 x 2 metric fine thread for fast, reliable hole acceptance checks and consistent results across parts and operators.
• Durable hardened steel construction: Resists wear and maintains accuracy through repeated use in demanding environments, reducing replacement costs and downtime.
• Left-hand compatibility and ergonomic grip: Designed for left-handed holes with a knurled body that offers secure handling and quick orientation in confined spaces for faster inspections.

Using the JBO GO gauge streamlines quality control by delivering clear go/no-go results, speeding up inspections, and helping you avoid rework. It supports reliable, repeatable measurements across production and assembly workflows, giving you confidence in every threaded part you qualify.