JBO Thread Ring Gauge (NoGo) - Metric Fine, Right Hand, 4h, M55 x 1 is a precision external thread gauge designed to quickly verify whether a component’s threads conform to the M55 x 1, 4h standard. It’s built for engineers, machinists, inspectors, and workshop technicians who need reliable go/no-go checks to ensure correct threading before parts move to assembly.

• NoGo quick-check for metric fine threads: Instantly confirms whether external threads meet the M55 x 1, 4h tolerance, speeding inspections and reducing guesswork.
• Hardened steel construction for long life: Resists wear and maintains measurement accuracy through heavy daily use in busy QC environments.
• Right-Hand oriented for standard inspection setups: Fits common fixtures and provides consistent results with minimal training and setup time.

This gauge helps you streamline quality control, shorten inspection cycles, and achieve consistent, reliable thread verification across batches. Its durable build reduces tool maintenance and replacement needs, while the straightforward NoGo indication integrates seamlessly into existing workflows—so you can deliver precise, compliant parts with confidence.