The JBO Thread Plug Gauge (NoGo) — Metric Fine, Right Hand, 6H, M64 x 2 — is a precision inspection tool designed to verify metric fine threaded holes. It’s ideal for inspectors, machinists, engineers, and maintenance technicians who need fast, reliable checks to ensure hole sizes meet the 6H tolerance. Made from hardened steel, this NoGo gauge delivers durability and long service life even in demanding manufacturing environments.

• Metric fine thread specialization: precisely tuned for metric fine threads such as M64 x 2, enabling accurate hole inspection and consistent results.
• No-Go quick checks: designed to quickly confirm that a threaded hole does not exceed the maximum size, helping you spot out-of-tolerance parts before assembly.
• Durable hardened steel body: built to withstand daily use in busy workshops, resisting wear and maintaining accuracy over time.

This plug gauge supports efficient quality control by delivering clear pass/fail results, reducing rework, and improving measurement repeatability across crews. Whether you’re verifying new parts or performing routine maintenance checks, it integrates smoothly into your inspection workflow and helps you meet precise metric fine-thread specifications with confidence.