JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M85 x 4 ER Mini Collet Chucks The tapered neck helps dampen

The tapered neck helps dampen cutting forces

5 precision and heat-assisted grip provide lasting stability and vibration damping

Left-hand spiral flute with right-hand cutting: optimized chip flow and predictable finishing action

Flute design: Left‑hand spiral flute for effective chip evacuation

and the DIN 206-B specification with ISO H5 tolerance ensures your finished holes meet exacting standards

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M85 x 4 ER Mini Collet Chucks The tapered neck helps dampenThe JBO Thread Ring Gauge (NoGo) is a precision tool for verifying external thread diameters, helping engineers, machinists, and quality teams confirm parts meet tolerances and fit reliably in assemblies. Designed with metric fine pitch for right hand threads, it uses M85 x 4 with a 6g tolerance, and is crafted from hardened steel for durability in demanding environments. Go No Go quick checks: Instantly determine whether the thread diameter is within