The JBO Thread Ring Gauge (NoGo) is a precision inspection tool designed to verify external thread diameters on bolts, fittings, and machined components. Used by quality control teams, machinists, and maintenance technicians, it provides a fast, reliable go/no-go check to confirm whether a threaded part matches the specified size and tolerance.

Built for metric fine threads, this Right Hand gauge features M18 x 1.5 threading and a 4h tolerance class. Constructed from hardened steel, it resists wear and keeps its accuracy even in demanding shop environments.

• Hardened Steel Construction: Durably built to resist wear and maintain precise measurements through thousands of inspections, making it a dependable part of any QC station.
• NoGo Quick-Check Design: Clear geometry lets inspectors immediately identify non-conforming threads, reducing inspection time and helping keep production on schedule.
• Metric Fine, M18 x 1.5 Compatibility: Specifically designed for the M18 x 1.5 metric fine thread, delivering consistent, repeatable gauging results aligned with industry standards.

In practice, the JBO NoGo thread ring gauge supports faster quality decisions, minimizes rework, and strengthens process control across manufacturing, automotive, and engineering environments. Its robust construction and precise sizing give you confidence that every threaded connection will fit right the first time, improving overall workflow and downstream performance.