JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - No. 6 x 40 Power Milling Chucks and maintains consistent results across

and maintains consistent results across different machines and workflows

clean cuts: coolant is delivered through the tool to the cutting edge

and ISO H4 tolerance to deliver repeatable bore sizes

Coating: AcuRea multi-layer nano chrome applied to the flute and land surfaces for reduced friction and extended edge life

stub-length carbide tool designed for through‑coolant machines

JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - No. 6 x 40 Power Milling Chucks and maintains consistent results acrossThe JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external UNF threads. Sized for Left Hand, 2A class, No. 6 x 40, it enables quick, confident checks in manufacturing, automotive, and aerospace environments. The No Go design helps you identify non conforming threads at a glance, supporting accurate assembly and reliable performance. Manufactured from hardened steel, this gauge delivers durability in busy inspection rooms. Its