The JBO Ring Gauge NoGo — Metric Coarse, Right Hand, 4h, M1.2 x 0.25 is a precision tool designed to verify external threads on fasteners and components. It helps machinists, inspectors, and quality teams quickly confirm that parts meet the metric coarse thread standard without guesswork.

Made from hardened steel, this NoGo gauge resists wear in busy workshops and provides durable, repeatable checks that keep production moving and reduce rework. Its straightforward design makes it easy to identify non-conforming parts at a glance, helping you maintain consistent fit and performance across assemblies.

• NoGo precision for metric coarse threads: Quickly identifies non-conforming external threads on M1.2 x 0.25 coarse pitches, enabling fast pass/fail decisions and reducing inspection time.
• Hardened steel construction: Built to endure everyday shop use, delivering long service life and stable measurements even after repeated handling and cleaning.
• Right-hand, 4h tolerance compatibility: Specifically engineered to match standard right-hand metric coarse thread specifications with a defined 4h class, ensuring consistent results across parts and batches.

Used within quality control and precision engineering workflows, this gauge helps ensure connectors and threaded components seat properly, fit reliably, and perform as intended in assemblies. Its durability and clear measurement criteria support efficient inspections, reduce downtime, and build confidence that every threaded connection meets the required standards.