The JBO Thread Ring Gauge (NoGo) is a precision tool for checking external metric threads. It is specifically designed for M20 x 2 right-hand, metric fine threads with a 6g tolerance, helping engineers, machinists, and quality inspectors quickly confirm that parts meet the maximum thread diameter specification.

Manufactured from hardened steel with carefully finished dimensions, this gauge delivers durable, long-lasting performance in busy workshops. Its NoGo design makes non-conforming threads instantly obvious, supporting faster, more reliable quality control decisions.

• Clear NoGo maximum-diameter verification: Quickly confirms that external threads do not exceed the specified maximum, delivering objective pass/fail results and reducing rework.
• Durable hardened steel construction: Resists wear and maintains accuracy over time, even in demanding, high-use environments.
• Designed for metric fine threads: M20 x 2, right-hand, 6g: Precisely matched to this thread form for reliable, repeatable inspections with minimal training.

Used in inspection workflows, the JBO Thread Ring Gauge helps you speed up quality checks, minimize downtime, and maintain consistent results across operators. It provides a dependable, straightforward method to verify that external threads meet the required standard, giving you confidence in every measurement and a smoother path from production to finished parts.