JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M21 x 0.75 End Mill Holders Gash tooth design to prevent

Gash tooth design to prevent flute chipping: A specially shaped gash tooth helps prevent flute chipping and promotes smooth chip evacuation

enhancing stability during deep groove and contour cutting

and consistent finishes when the job demands toughness

tight‑tolerance hole finishing is essential

5-balanced precision at up to 25

JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M21 x 0.75 End Mill Holders Gash tooth design to preventThe JBO Thread Ring Gauge (NoGo) Metric Fine Left Hand 6g M21 x 0. 75 is a precision inspection tool designed to verify external thread diameters across a range of industries. Its built for engineers, machinists, inspectors, and quality teams who need fast, reliable checks to confirm threaded components meet exact specifications. The NoGo design helps quickly identify threads that are out of tolerance, reducing guesswork and rework during production