The JBO Thread Ring Gauge (NoGo) is a precision tool designed for quick, reliable verification of external thread diameters. Ideal for engineers, inspectors, machinists, and quality-conscious shops, it provides a clear go/no-go check to confirm parts meet the specified size and pitch. With a right-hand orientation and metric fine threading, it streamlines acceptance testing across projects and production runs.

Crafted for durability, this gauge is made from hardened steel to withstand daily use in demanding environments. It is calibrated for metric fine threads at M50 x 1.5 (4h), ensuring accurate, repeatable results and easy compatibility with standard inspection workflows.

• Go/No-Go Verification for Quick QC: Instantly determine whether a thread is within tolerance, speeding inspections and reducing guesswork.
• Metric Fine Thread Calibration (M50 x 1.5): Precise reference for external thread checks that supports consistent results across batches.
• Durable Hardened Steel Construction: Built to resist wear and deliver long service life in busy workshop environments.

Using this gauge helps you tighten quality control, cut down rework, and ensure reliable, repeatable threaded assemblies. It provides a clear, objective standard for pass/fail decisions, improving workflow efficiency and giving your team a dependable measurement reference from setup through final inspection.