The JBO Thread Ring Gauge (GO) — Metric Fine, Right Hand, 4h, M55 x 1.5 is a precision tool designed to verify external thread sizes during inspection and quality control. Ideal for engineers, machinists, and maintenance crews across manufacturing, automotive, and aerospace environments, it helps you quickly determine whether a threaded component meets the exact external thread specification.

Crafted from hardened steel, this ring gauge offers exceptional durability and wear resistance for daily use in demanding work settings. Its user-friendly design makes it easy to identify properly conforming parts, supporting fast decisions and consistent quality in your inspection process.

• Precise GO gauge for external threads: Quickly confirm the exact external thread size (M55 x 1.5, metric fine) and correct hand direction to ensure parts meet spec during routine inspections.
• Durable hardened steel construction: Built to withstand wear and maintain accuracy in busy shop environments, delivering long service life with minimal maintenance.
• User-friendly and reliable: Simple handling and clear reference points reduce setup time and boost confidence in QC results across workflows.

By delivering fast, repeatable checks, this gauge streamlines your inspection workflow, reduces rework, and helps maintain consistent thread quality across production runs.