JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M4 x 0.25 FMH FLH FHH S&E A&NF M&D helping you achieve true holes

helping you achieve true holes consistently in a range of metals and alloys

The hollow-ground design minimizes side rubbing

{Flute direction}: Left-hand spiral flute with right-hand cutting

repeatable sizes

and help you achieve repeatable

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M4 x 0.25 FMH FLH FHH S&E A&NF M&D helping you achieve true holesThe JBO Thread Ring Gauge (GO) Metric Fine Right Hand 6g M4 x 0. 25 is a precision tool designed for inspecting external threads on fasteners, shafts, and mating parts. Built for engineers, machinists, and quality teams, it supports quick Go checks to confirm that a components thread diameter and pitch meet the M4 x 0. 25 metric fine standard. Made from hardened steel for durability and wear resistance, this GO gauge maintains accuracy through heavy