The JBO Thread Ring Gauge (GO) - Metric Fine is a precision tool designed to verify external thread diameters with reliability. It’s ideal for engineers, machinists, quality teams, and workshop technicians who need accurate checks for metric fine threads. Specifically configured for left-handed M48 x 1.5 threads and built to 6g tolerance, this GO gauge helps confirm conformance quickly and confidently.

Crafted from hardened steel, the gauge delivers exceptional durability and wear resistance to withstand the rigors of demanding work environments. Its user-friendly design makes it straightforward to identify properly conforming threaded components during quality control and precision engineering workflows.

• Precise GO verification for metric fine threads: Enables quick pass/fail checks for left-hand M48 x 1.5 threads, supporting fast, traceable inspections and reduced rework.
• Hardened steel construction for long life: Provides outstanding wear resistance and reliable performance in busy shops over extended service life.
• Left-hand thread compatibility: Specifically designed for left-handed threads, helping you avoid misfits and ensuring you’re measuring the correct thread form.

By delivering clear, reliable go/no-go results, this gauge streamlines inspection workflows, supports consistent thread quality across parts, and helps teams maintain accurate quality records. Its durable construction reduces downtime and replacement costs while enhancing confidence in every threaded assembly.