The JBO Thread Ring Gauge (GO) is a precision tool for verifying external thread diameters on fasteners, fittings, and machined parts. It is ideal for engineers, machinists, quality control teams, and workshop technicians who need quick, reliable checks against metric fine thread standards.

Built for durability, this GO gauge features hardened steel construction and is sized for right-hand M56 x 1.5 threads with a 6h tolerance—delivering long-lasting performance in demanding environments.

• Hardened steel construction: Designed to resist wear and maintain accurate tolerances over time, ensuring reliable measurements even after heavy daily use.
• GO gauge for Metric Fine threads: Provides quick, decisive pass/fail indications against M56 x 1.5 standards, speeding up inspections and reducing guesswork.
• Right-hand, 6h tolerance compatibility: Precisely matched to right-hand metric fine threads, delivering consistent results with less rework on production and quality control checks.

Using this gauge helps streamline quality control, accelerate first-pass acceptance, and standardize thread inspections across parts and assemblies. Its durability and precise tolerances translate into fewer tool replacements, reduced downtime, and greater confidence when verifying threaded components for critical applications.