JBO Thread Ring Gauge (GO) - Metric Coarse - Left Hand - 6g - M30 x 3.5 Face Mill Arbors - Through Coolant allowing more holes to be

allowing more holes to be finished before regrinding and reducing downtime in high-demand production environments

giving you flexible options for intricate contours

helping you maintain dimensional accuracy and surface quality across jobs that demand tight tolerances

Ideal use: Perfect for deep-pocket milling and complex geometry where accessibility is limited

JBO Thread Ring Gauge (GO) - Metric Coarse - Left Hand - 6g - M30 x 3.5 Face Mill Arbors - Through Coolant allowing more holes to beThe JBO Thread Ring Gauge (GO) is a precision inspection tool designed to verify external metric coarse threads. Specifically configured for lefthand M30 x 3. 5 LH threads, it helps ensure mating parts will thread together smoothly and reliably. Crafted from hardened steel for lasting durability in busy workshop environments, this GO gauge resists wear and maintains accurate measurements through repeated use. Its simple, userfriendly design supports