The JBO Thread Ring Gauge (NoGo) - Metric Fine, Left Hand, 6g, M15 x 0.5 is a precision inspection tool designed to verify external thread diameters quickly and reliably. It’s ideal for manufacturers, machinists, inspectors, and engineers who need to confirm that threaded components meet exact Metric Fine specifications and left-hand thread standards.

Durable construction and a user-friendly design help ensure consistent results in demanding environments, making quality checks straightforward at any stage of production.

• NoGo Function for Maximum Diameter Verification: Quickly identify non-conforming left-hand M15 x 0.5 threads by testing the maximum allowable diameter, speeding up pass/fail decisions in inspection routines.
• Hardened Steel Construction: Built to resist wear and maintain dimensional stability, delivering long tool life in busy fabrication shops.
• User-Friendly Design for Fast QC: Simple handling and clear results help inspectors and operators spot out-of-tolerance parts at a glance, reducing rework and downtime.

Use this gauge to streamline QC workflows, improve first-pass yields, and ensure thread compliance across machining and assembly lines. Its durable build and precise sizing support reliable, repeatable measurements, giving you confidence in every threaded connection.