The JBO Thread Ring Gauge (NoGo) – Metric Fine, Right Hand, 4h, M39 x 2 is a precision inspection tool designed to verify external thread diameters for metric fine threads. Ideal for engineers, machinists, quality teams, buyers, and workshop professionals, it helps you quickly determine whether a threaded component meets the required size tolerance.

Crafted from hardened steel, this NoGo gauge delivers exceptional durability and wear resistance, making it a dependable choice for daily use in busy workshops and QC laboratories. Its right-hand orientation and metric fine specification (M39 x 2, 4h) ensure compatibility with common thread standards and straightforward setup for reliable inspections.

• Exact M39 x 2 Metric Fine NoGo gauge: Quickly confirms external thread diameters against the 4h class, enabling fast pass/fail decisions and keeping production moving.
• Hardened steel, wear‑resistant construction: Built for long life in demanding environments, maintaining accuracy and reducing replacement costs over time.
• Right-hand design for easy, reliable checks: Intuitive orientation and simple handling mean faster inspections and fewer setup errors on busy lines.

This gauge helps you streamline quality control by delivering precise, repeatable measurements for threaded components. Use it to speed up inspections, reduce downtime, and consistently meet standard specifications in manufacturing, assembly, or repair workflows.