JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M21 x 0.75 Hydraulic Expansion Chucks Durable carbide with W coating

Durable carbide with W coating for longer life: Built from high-quality carbide and equipped with a wear-resistant W coating to extend tool life

extending tool life and reducing rework in hard-to-cut alloys

improving stability during deep groove machining

ideal for deep grooves and tight fillets

The corner radius option lets you tailor radii to your cavity geometry

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M21 x 0.75 Hydraulic Expansion Chucks Durable carbide with W coatingThe JBO Thread Ring Gauge (GO) Metric Fine Left Hand 6g M21 x 0. 75 is a precision inspection tool designed to verify external thread diameters against metric fine thread standards. It serves machinists, quality control professionals, and engineers by providing a reliable go no go reference to confirm parts meet exact threading specifications. crafted from hardened steel for durability in demanding environments, this GO gauge resists wear and