JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M12 x 1.25 Face Mill Arbors repeatable hole sizes (to ISO

repeatable hole sizes (to ISO H5) with fewer passes

Finished to ISO H5 tolerance within the DIN 8051 B standard

providing stable alignment during reaming and easier setup

Using the JBO Thread Ring Gauge helps streamline your inspection process

accurate bore finishes in shallow or through holes

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M12 x 1.25 Face Mill Arbors repeatable hole sizes (to ISOThe 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