The JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M18 x 1.5 is a purpose-built tool for precise checking of external threads on components across manufacturing and assembly lines. This GO gauge helps inspectors quickly confirm whether a part meets the exact diameter, pitch, and thread form required for reliable mating with nuts, bolts, or threaded inserts.

Weighing just 6 g and crafted for metric fine threads, this gauge is designed for left-hand thread checks, delivering fast, unmistakable pass/fail feedback to support quality control and precision engineering.

• Precise GO gauge for metric fine threads: Accurately checks external thread diameters to confirm parts meet the M18 x 1.5 specification and ensure consistent threading accuracy during inspection.
• Left-hand thread design for quick checks: Tailored for left-hand threaded components, enabling fast, unambiguous pass/fail determinations on the production floor.
• Hardened steel construction for durability: Built from hardened steel to resist wear, maintain dimensional stability, and endure heavy use in demanding shop environments.

Using this GO gauge, inspectors and machinists can quickly validate external thread diameters, reducing guesswork and speeding up QA checks. The durable hardened steel construction and precise metric fine threading ensure consistent, repeatable results across production runs, helping you meet strict size tolerances and customer specifications with confidence. The compact, lightweight design supports seamless integration into everyday inspection routines, minimizing downtime and ensuring reliable quality control across batches.