JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M85 x 2 NCDC Drill Chuck It features a 12 mm

It features a 12 mm bore and a 63 mm gauge length

and exotic metals

The left-hand spiral flute combined with right-hand cutting provides stable cutting action and efficient chip evacuation for clean

accurate through-holes and reliable repeatability in both production and workshop environments

and dedicated reaming operations

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M85 x 2 NCDC Drill Chuck It features a 12 mmThe JBO Thread Ring Gauge (GO) Metric Fine, Left Hand, 6g, M85 x 2 is a precision inspection tool used to verify external thread diameters. Its designed for engineers, machinists, quality control professionals, and workshop teams who need fast, reliable conformance checks for metric fine threads. Crafted from hardened steel for exceptional wear resistance, this GO gauge maintains accuracy in demanding environments. Its left hand configuration ensures