JBO Thread Ring Gauge (NoGo) - Metric Coarse - Left Hand - 6g - M6 x 1 NCDC Drill Chuck making it a dependable choice

making it a dependable choice for production runs and precision assemblies alike

reliable performance in demanding workshop environments

The spiral flute design helps flush chips away from the cutting edge

57mm is an intermediate precision carbide reamer designed to finish pre-drilled holes with tight tolerance

helping you maintain consistent hole sizes and workflow efficiency

JBO Thread Ring Gauge (NoGo) - Metric Coarse - Left Hand - 6g - M6 x 1 NCDC Drill Chuck making it a dependable choiceThe JBO Thread Ring Gauge (NoGo) Metric Coarse Left Hand 6g M6 x 1 is a precision inspection tool designed to verify external thread diameters on fasteners, fittings, and machined components. Its ideal for qualityconscious shops, manufacturers, and maintenance teams that require quick, reliable go nogo checks for metric coarse threads. Designed for demanding environments, it uses hardened steel construction for durability and long life. Durable