The JBO Thread Ring Gauge (NoGo) for Metric Coarse threads is a precision inspection tool designed for quality control teams, engineers, machinists, and inspectors who need fast, reliable checks of external thread diameters. It supports quick Go/No-Go checks to confirm parts meet the M4 x 0.7 coarse-thread standard, helping you verify correct fit and function quickly in production and QC workflows.

Crafted from hardened steel, this gauge offers exceptional durability and wear resistance for long service life in demanding workshops and QC labs. Its straightforward, user-friendly design makes it easy to identify non-conforming parts, helping reduce rework and downtime while ensuring consistent quality control across batches.

• Durable hardened steel construction: Built to withstand daily use in busy shops and inspection labs, delivering long-lasting accuracy and reduced replacement costs.
• NoGo verification for metric coarse threads (M4 x 0.7, 6e, right-hand): Enables fast, reliable go/no-go checks to confirm parts meet maximum thread size and prevent mismatches in assemblies.
• Easy-to-use, clearly marked design: Designed for quick, confident use, enabling rapid identification of non-conforming threads with minimal setup.

Using the JBO Thread Ring Gauge streamlines quality control, reduces inspection time, and helps ensure consistent results across production runs. The hardened steel body delivers dependable performance in demanding environments, while the Go/No-Go capability minimizes the risk of assembling parts that don’t meet standard specifications. This gauge supports reliable fitment and functional performance for metric coarse threaded connections in a wide range of applications.