JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M4 x 0.35 ER Collet Chucks note that the “in stock”

note that the “in stock” label refers to blanks ready to be machined into the reamer you need

it ensures you receive a tool aligned with your specifications

helping you achieve consistent finishes in tight cavities and complex features

The combination of precise sizing and durable construction means reliable results you can trust

and delivers consistent threaded assemblies

JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M4 x 0.35 ER Collet Chucks note that the “in stock”The JBO Thread Ring Gauge (NoGo) Metric Fine Left Hand 6g M4 x 0. 35 is a precision measuring tool designed to validate external thread diameters on fasteners and threaded components. Its ideal for engineers, inspectors, machinists, and quality teams who need fast, reliable checks to confirm parts meet exact thread standards. Manufactured from hardened steel, this NoGo gauge resists wear in demanding shop environments and maintains accuracy through