The JBO Thread Ring Gauge (NoGo) is a precision inspection tool designed to verify external thread diameters on metric fasteners and threaded components. Specifically crafted for M4 x 0.5 right-hand threads with a 6h tolerance, this NoGo gauge enables quick, accurate conformance checks during manufacturing, assembly, and quality control workflows.

Crafted from hardened steel for lasting accuracy, the gauge stands up to wear in busy workshops and demanding environments. Its straightforward design makes it easy to identify non-conforming parts at a glance, helping to minimize inspection time and downstream rework while supporting consistent results across jobs.

• M4 x 0.5 Fine Thread Compatibility: Precisely sized for M4 x 0.5 right-hand threads (6h), enabling fast, reliable external-diameter checks and straightforward conformance verification.
• Hardened Steel Durability: Built from hardened steel to resist wear and maintain accuracy through repeated use in tough shop conditions.
• Clear NoGo Indication: NoGo design provides an immediate pass/fail read, speeding inspections and reducing downtime in quality control workflows.

Using the NoGo ring gauge for M4 x 0.5 threads helps streamline your quality process by delivering repeatable measurements, preventing out‑of‑tolerance parts from progressing in production, and supporting confident decisions in assembly and procurement. It’s a reliable, long‑lasting tool that enhances accuracy and efficiency across the job—from inspection stations to final assembly.