JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M21 x 0.5 Endmill25 mold shops

mold shops

ensuring you receive a freshly calibrated tool tailored to your needs

and reliable performance on challenging mold and die projects—from rapid prototypes to production runs

Precise metric fine thread verification: Quickly confirms the NoGo maximum size for M56 x 2 holes

and reduced downtime in production and workshop environments

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M21 x 0.5 Endmill25 mold shopsThe JBO Thread Ring Gauge GO Metric Fine is a precision measurement tool designed to verify external thread diameters and ensure components conform to the M21 x 0. 5 standard with a 6g tolerance. Its ideal for engineers, machinists, inspectors, and maintenance teams who need fast, reliable checks during production, assembly, or quality control. Crafted from hardened steel for durability, this GO gauge is built to withstand daily use in busy workshops.