JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M39 x 1.5 ER Collet Chucks repeatable hole sizes and easy

repeatable hole sizes and easy interchangeability with standard tooling

Broad diameter range with tight tolerance: Covers 0

enabling clear pass/fail decisions without ambiguity

unambiguous checks to confirm whether a threaded hole meets tolerance

Built with durable materials and designed for longevity

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M39 x 1.5 ER Collet Chucks repeatable hole sizes and easyThe JBO Thread Ring Gauge (NoGo) Metric Fine Right Hand 6g M39 x 1. 5 is a precise external thread gauge designed to verify metric fine threads with quick, reliable Go NoGo checks. Its ideal for machinists, quality inspectors, and maintenance teams who need fast confirmation that threaded parts meet exact size and tolerance requirements. Crafted from hardened steel, this gauge is built for durability in busy workshops. The user friendly NoGo design