The JBO Thread Ring Gauge (NoGo) - Metric Coarse is a precision inspection tool designed to verify external threads on metric coarse fasteners and components. Suitable for engineers, machinists, quality inspectors, and maintenance staff, it provides quick, reliable Go/NoGo checks to confirm parts meet M1.4 x 0.3 coarse thread specifications. The right-hand orientation and 4h tolerance help ensure consistent results across production runs, while a knurled edge adds effortless grip in busy work environments. A distinctive red alignment mark aids fast orientation during inspection.

• Go/NoGo Quick Verification: rapidly determine if a threaded part falls within Go (acceptable) or NoGo (out of spec) limits, speeding up QC checks and reducing rework.
• Durable Hardened Steel Construction: built to endure daily use on shop floors and in metrology labs with excellent wear resistance for long service life.
• Metric Coarse Precision, M1.4 x 0.3, Right-Hand, 4h: precisely manufactured to the standard coarse thread profile with the required 4h tolerance and right-hand orientation, delivering reliable, repeatable pass/fail results across compatible components.

Used in quality control and precision engineering workflows, this gauge helps you verify thread fitment quickly, confidently, and with traceable accuracy. By providing clear, objective results, it supports smoother assembly processes, reduces downtime, and helps maintain consistent performance across parts and batches.