The JBO Thread Ring Gauge (NoGo) is a precision external thread gauge designed to verify metric fine-thread sizes quickly and reliably. With its NoGo limit in mind, it helps engineers, machinists, quality inspectors, and maintenance professionals confirm that M40 x 1.5 threaded components meet strict size standards without guesswork.

Crafted from hardened steel for lasting durability, this gauge resists wear in busy workshops and maintains accuracy across daily inspections. The right-hand, 4h configuration makes it a natural fit for common metric hardware checks, while a clear NoGo indication helps you spot non-conforming parts at a glance and keep production moving smoothly.

• Metric Fine NoGo precision: Confirms external threads do not exceed the NoGo limit for M40 x 1.5 fine-pitch threads, enabling fast, reliable pass/fail checks and reducing rework.
• Hardened steel durability: Built to withstand daily wear in demanding environments, delivering long-lasting accuracy and consistent performance across inspections.
• User-friendly right-hand design with knurled grip: Easy to integrate into standard inspection routines, with a secure grip and clear orientation that speeds setup and minimizes errors.

Using this gauge helps you streamline QC workflows, cut inspection time, and improve the reliability of threaded assemblies. Its durability and clear NoGo indication give you confidence that measurements are consistent over time, reducing downtime and rework while ensuring parts meet specification every time.