JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M21 x 1 End Mill Holders this holder delivers consistent performance

this holder delivers consistent performance under demanding use

this hand reamer delivers controlled cutting action for accurate hole sizes in metalworking

reducing tool changes and simplifying your tool inventory

Designed for professionals who demand dependable

ensuring stable and consistent results over time

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M21 x 1 End Mill Holders this holder delivers consistent performanceThe JBO Thread Ring Gauge (NoGo) is a precision inspection tool crafted for engineers, machinists, quality teams, and workshop technicians. It verifies external metric thread diameters for fine pitches, specifically M21 x 1 right hand threads in the 6g tolerance class, providing a clear NoGo check to confirm parts meet required standards. Designed to streamline quality control, it helps you quickly identify components that do not conform and prevent