JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M56 x 2 Boring Bar Blank giving you a clear

giving you a clear

and ISO H5 tolerance (DIN 8051 B references)

Through coolant: Flushed chips and improved cooling extend tool life while delivering smoother bore surfaces and better finish quality

this reamer maintains sharpness longer under heat and friction

BS 328/4‑compliant

JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M56 x 2 Boring Bar Blank giving you a clearThe JBO Thread Ring Gauge (NoGo) Metric Fine, Left Hand, 6g, M56 x 2 is a precision inspection tool designed to verify external thread dimensions quickly and reliably. Its ideal for quality control teams, machine shops, maintenance crews, and anyone working with metric fine thread fasteners who needs fast, clear pass fail results. Made from hardened steel for durability in busy environments, this NoGo gauge helps you identify non conforming threads at