JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M39 x 1 FMH FLH FHH S&E A&NF M&D Left-hand flute with right-hand cutting:

Left-hand flute with right-hand cutting: Delivers smooth material removal and clean bore surfaces with stable cutting action

helping you complete molds and dies more efficiently while preserving tight tolerances and finish quality

Its compact 15 mm diameter and 5 mm bore fit standard slitting saw setups

M45 x 3 with 6H tolerance: Enables precise go/no-go verification of internal threads to the exact size and tolerance required

Perfect for shops prioritizing reliable performance in aluminum-focused work

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M39 x 1 FMH FLH FHH S&E A&NF M&D Left-hand flute with right-hand cutting:The JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external threads against the M39 x 1 metric fine standard. Built for right hand threads (6g tolerance), it helps shops, manufacturers, and QA teams quickly confirm part conformance and identify non conforming components with confidence. Made from hardened steel, this gauge delivers durable, long lasting performance in demanding environments while delivering reliable, repeatable