JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M12 x 0.5 ER Mini Collet Chucks reducing tool deflection during deep

reducing tool deflection during deep groove profiling

accurate cuts and reducing part variance

With its 6 mm shank and diameter range tailored to fine-detail work

42 mm hole sizing for metalworking projects

Coating: Uncoated surface finish to improve chip evacuation and minimize friction

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M12 x 0.5 ER Mini Collet Chucks reducing tool deflection during deepThe JBO Thread Ring Gauge (GO) Metric Fine, Left Hand, M12 x 0. 5 is a precision inspection tool designed to verify external thread diameters with accuracy and speed. Its ideal for engineers, machinists, quality professionals, and assembly teams who need reliable go no go checks to confirm parts meet exact size and fit requirements. Manufactured from hardened steel, this GO gauge provides lasting durability and wear resistance for busy shop floors and