JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M138 x 2 ER Mini Collet Chucks 89 mm nominal diameter and

89 mm nominal diameter and a left-hand spiral flute paired with right-hand cutting

Precise metric Go gauge for M98 x 1

The JBO Thread Plug Gauge is a precision inspection tool designed to quickly verify metric coarse threaded holes

Designed to integrate into daily workflows

0 mm and offers multiple neck lengths for different depths and contours

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M138 x 2 ER Mini Collet Chucks 89 mm nominal diameter andThe JBO Thread Ring Gauge (GO) Metric Fine, Right Hand, 6g, M138 x 2 is a precision inspection tool designed to verify external threads on fasteners and threaded components. Used by machinists, engineers, inspectors, and quality teams across industries, it provides a quick, reliable go check to confirm conformance with metric fine thread specifications. Made with hardened steel for durability and wear resistance, this GO gauge is built to endure the