JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M12 x 1.25 Face Mill Arbors accurate bore finishes in shallow

accurate bore finishes in shallow or through holes

and precise H5 tolerance makes it a reliable choice for achieving accurate hole sizes with minimal rework in demanding workshops

The combination of M35 cobalt content and a left-hand spiral flute paired with right-hand cutting provides predictable performance in precision reaming while maintaining compatibility with standard straight-shank setups

Finished to ISO H5 tolerance within the DIN 8051 B standard

repeatable hole sizes (to ISO H5) with fewer passes

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M12 x 1.25 Face Mill Arbors accurate bore finishes in shallowThe JBO Thread Ring Gauge GO Metric Fine, Right Hand, 6g, M12 x 1. 25 is a precision tool designed to verify external thread sizes quickly and reliably. Its ideal for engineers, machinists, quality inspectors, and shop staff who need to confirm that threaded components meet exact specifications in production, assembly, or maintenance tasks. Crafted from hardened steel for durability, it resists wear in busy environments and maintains its accuracy over