JBO Thread Ring Gauge (GO) - UNC - Right Hand - 3A - 3/8 x 16 NCDC Drill Chuck 17 mm bore with ISO

17 mm bore with ISO H5 tolerance: Delivers precise

helping you achieve precise hole dimensions with good surface quality

Designed for machinists who demand strict tolerance control and reliable performance in DIN 212-B applications

Tolerance: ISO H5 tolerance for tight

Rigid Tapping for Consistent Threads: Synchronizes spindle rotation and feed for precise thread formation

JBO Thread Ring Gauge (GO) - UNC - Right Hand - 3A - 3/8 x 16 NCDC Drill Chuck 17 mm bore with ISOThe JBO Thread Ring Gauge (GO) for UNC threads is a precision tool designed to verify external thread diameters and thread form on fasteners and machined parts. Specifically calibrated for 3 8 16 UNC right hand threads, it enables inspectors, machinists, and quality teams to quickly determine whether a component meets required thread standards in production, assembly, or service contexts. Crafted from hardened steel, this GO gauge delivers durable