The JBO Thread Ring Gauge NoGo (Metric Fine, Left Hand) is a precision inspection tool designed to verify external thread diameters on components with metric fine threads, including M40 x 1. It’s ideal for machinists, inspectors, and maintenance teams who need fast, dependable checks to confirm parts meet exact specifications.

Crafted from hardened steel for maximum durability, this NoGo gauge resists wear in demanding workshop environments, delivering long-lasting, reliable performance.

• Metric Fine, Left-Hand M40 x 1 NoGo Gauge: Precisely sized for left-handed metric fine threads, specifically M40 x 1, enabling quick verification of external thread diameters against the target specification and rapid detection of out-of-tolerance parts.
• Hardened Steel Construction: Built to endure daily use, resist wear, and maintain accurate dimensions over time—perfect for busy workshops, QC labs, and field service.
• Fast, Clear Pass/Fail Feedback: Delivers immediate, unambiguous indication of whether a threaded component is within tolerance, speeding up quality checks and reducing production downtime.

With its precision and durability, this gauge streamlines quality control, supports consistent assembly fits, and helps you maintain standard compliance across batches. Whether you’re performing incoming inspection, in‑process checks, or routine maintenance, the JBO NoGo Thread Ring Gauge delivers reliable measurements, minimizes rework, and keeps your operation moving smoothly.