JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M4 x 0.25 S&E It combines a left-hand spiral

It combines a left-hand spiral flute with right-hand cutting for controlled material removal and smooth bore finishes

and extended intervals between regrinds—helping you complete heavy milling passes with confidence and finish parts to spec

Intended use: Ideal for production cutting and arduous applications

cleaner holes and tight size control that meets strict standards

featuring a straight shank designed for stable

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M4 x 0.25 S&E It combines a left-hand spiralThe JBO Thread Plug Gauge is a precision tool designed to verify metric fine threaded holes. It uses a Go No Go design to quickly confirm that M4 x 0. 25 threads meet the required size and tolerance, making it ideal for quality checks during manufacturing, assembly, and maintenance. This gauge is tailored for right hand threaded holes, helping you confirm proper fit every time. Go No Go design for fast, confident hole checks: Quickly determine if a