The JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M40 x 0.75 is a precision tool for verifying external thread diameters to metric fine standards. It’s an essential instrument for engineers, machinists, inspectors, and maintenance teams who need fast, reliable confirmation that threaded components meet exact specifications.

Crafted from hardened steel for outstanding durability, this GO ring gauge withstands daily workshop use and resists wear to maintain measurement stability over time. Its user-friendly design enables quick identification of properly conforming threads, helping quality-control processes run smoothly on busy production floors.

• Precise metric fine threading (M40 x 0.75): Delivers accurate outer diameter and pitch checks to the metric fine standard, ensuring parts fit correctly and reducing guesswork during assembly.
• Durable hardened steel construction: Built to resist wear and maintain dimensional stability in demanding environments, delivering long service life.
• Right-hand GO design with clear, user-friendly use: Simplifies alignment and provides fast go/no-go confirmations, speeding inspections and reducing downtime.

With this gauge in your toolkit, inspections become quicker and more reliable. It supports consistent thread quality across batches, reduces rework and fit issues, and helps your team meet tight tolerances with confidence—whether you’re performing incoming checks, in-process verification, or final assembly.