JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 4h - M9 x 1 Endmill25 Through-Coolant with left-hand spiral flute:

Through-Coolant with left-hand spiral flute: Through coolant improves cooling and chip evacuation

and workshops that require reliable bore finishing with minimal downtime

it reams clean

Size-specific for M7 x 1

and defined corner radius helps you complete complex geometries with precision—lowering downtime

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 4h - M9 x 1 Endmill25 Through-Coolant with left-hand spiral flute:The JBO Thread Ring Gauge (GO) Metric Fine, Right Hand, 4h M9 x 1 is a precision external thread gauge designed to help you confirm whether threaded components meet exact size and tolerance requirements. Ideal for engineering teams, machine shops, inspectors, and quality departments, it enables quick, reliable verification during production, assembly, and maintenance tasks. Crafted from hardened steel for lasting durability, this GO gauge is built to