JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6h - M4 x 0.25 Endmill25 thanks to its ISO H5

thanks to its ISO H5 tolerance (D) and high-speed steel construction

while the coating and carbide nature extend tool life and stabilize performance

Whether you’re enlarging an existing hole or achieving a precise finish

Straight shank for broad machine compatibility: Fits a wide range of drilling machines

extending tool life and maintaining sharpness over many cuts

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6h - M4 x 0.25 Endmill25 thanks to its ISO H5The JBO Thread Ring Gauge GO Metric Fine is a precision tool designed to quickly verify external thread diameters for metric fine threads. It helps quality teams, machine shops, and engineering labs confirm that threaded components meet exact standards before assembly or shipment. Crafted from hardened steel for durability, this GO ring gauge resists wear in busy production environments and maintains stable performance over time. Its right hand