JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M64 x 2 Face Mill Arbors - Through Coolant plus a straight shank for

plus a straight shank for broad compatibility with standard chucks and collets

With a 4‑flute configuration and a tapered neck

reliable verification during production

Substrate: HSS-E (M35 cobalt) construction

and promotes efficient chip evacuation for faster

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M64 x 2 Face Mill Arbors - Through Coolant plus a straight shank forThe JBO Thread Ring Gauge (GO) Metric Fine Left Hand 6g M64 x 2 is a precision inspection tool designed to verify external thread diameters with reliability. Ideal for engineers, machinists, quality control professionals, and workshop technicians, it provides quick, repeatable checks to confirm components meet specified thread standards. Crafted from hardened steel for durability, this metric fine, left hand GO gauge resists wear in demanding