Introducing the JBO Thread Ring Gauge (GO) – BSF – Right Hand – Medium Class – 1/4 x 26. This GO gauge is built for fast, reliable verification of external BSF threads, helping engineers, machinists, and inspectors confirm that each part matches the specified diameter and pitch during production or quality control.

Made from hardened steel for exceptional durability, it stands up to daily use in busy workshops and inspection routines. The compact, user-friendly design provides clear, quick results—a simple go/no-go check that supports consistent tooling setup, faster inspections, and fewer rework cycles.

• Fast, go/no-go thread checks: Instantly verify external BSF threads (1/4 x 26, right-hand, Medium Class) to confirm parts meet specification, speeding up inspection and reducing rework.
• Rugged, hardened steel construction: Built to withstand daily use in busy workshops and manufacturing environments, delivering long service life with minimal wear.
• Accurate, repeatable results: Precise GO dimensions ensure consistent measurements across operators and lots, improving quality control reliability and traceability.

With the JBO Thread Ring Gauge, you get a durable, easy-to-use tool that integrates into standard inspection workflows. It helps you quickly validate thread conformity, streamline setup, and maintain consistent part quality across batches, giving your team confidence in every measurement.