The JBO Thread Ring Gauge (GO) - Metric Fine is a GO gauge designed to verify external thread diameters on metric fine threads. It’s ideal for quality control teams, machinists, inspectors, and assembly technicians who need fast, reliable confirmation that threads meet spec. Weighing just 6 g, it’s compact enough for everyday shop floor use and easy to carry between workstations.

Built from hardened steel, this gauge delivers durability and wear resistance in busy environments. Its right-hand design supports standard metric fine-thread applications, including M3 x 0.25, helping ensure consistent, accurate checks across production runs.

• Precise metric fine-thread validation: Verifies external thread diameters against metric fine standards (M3 x 0.25) with 6g tolerance to deliver reliable go checks.
• Hardened steel construction: Tough, wear-resistant body that stands up to daily use in demanding workshops, extending tool life and reducing replacement costs.
• Easy, on-the-spot identification: Clear go/no-go results and a user-friendly design allow quick inspections, minimizing downtime and improving first-pass quality.

This GO gauge helps you accelerate quality control by providing fast, unambiguous checks that confirm thread conformity. Its durable construction supports long-term performance across multiple shifts and job sites, giving you confidence that every threaded component meets the required standard before assembly.