JBO Thread Plug Gauge (GO) - Metric Fine - Right Hand - 6H - M52 x 4 FMH repeatable hole sizes and easy

repeatable hole sizes and easy mating with components across production runs

delivers precise hole finishing to ISO H4 tolerances with a straight shank and left‑hand spiral flute for reliable

Sized for tight spaces

is a precision tool built for clean countersinks and smooth chamfers

helping you achieve smooth surfaces and accurate bore dimensions

JBO Thread Plug Gauge (GO) - Metric Fine - Right Hand - 6H - M52 x 4 FMH repeatable hole sizes and easyThe JBO Thread Plug Gauge (GO) Metric Fine Right Hand 6H M52 x 4 is a precision go gauge designed to verify threaded holes in metal parts and assemblies that use Metric Fine, M52 x 4 right hand threads. It enables quick, reliable checks to confirm holes meet the required standard, helping inspectors and machinists maintain consistent quality across projects. Built from hardened steel for lasting durability, this gauge resists wear in demanding shop