JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M42 x 2 ER Collet Chucks Used in production and workshops

Used in production and workshops

improving chip evacuation and reducing heat buildup for a better finish

helping you confirm fitment accuracy

The combination of left-hand flute and right-hand cutting supports controlled material removal in precise applications

this reamer combines left-hand spiral flutes with right-hand cutting to deliver stable cutting action and clean bore finishes

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M42 x 2 ER Collet Chucks Used in production and workshopsThe JBO Thread Ring Gauge (GO) Metric Fine Left Hand M42 x 2 is a precision tool designed to verify external thread diameters to the metric fine standard. It helps technicians, engineers, and quality teams quickly determine whether threaded components meet the M42 x 2 specification during production, inspection, or maintenance. Made from hardened steel for long lasting durability, this GO gauge resists wear in busy shop environments and maintains