JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6h - M21 x 1 Endmill25 is engineered for precision mold

is engineered for precision mold and die work

small-diameter reaming tasks

User‑Friendly

Use this tool when you need dependable size accuracy

while the durable W coating boosts wear resistance for longer tool life and steadier performance

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6h - M21 x 1 Endmill25 is engineered for precision moldThe JBO Thread Ring Gauge (NoGo) Metric Fine Right Hand 6h M21 x 1 is a precision inspection tool designed to verify external thread diameters with speed and confidence. Its ideal for engineers, machinists, quality inspectors, and maintenance teams who need reliable checks that keep production moving and parts within specification. Crafted from hardened steel, this NoGo gauge resists wear in demanding workshop environments and delivers long lasting