The JBO Thread Ring Gauge (NoGo) – Metric Fine is a precision inspection tool designed to verify external thread diameters. Built for engineers, machinists, quality teams, and workshop technicians, it helps ensure fast, reliable checks of mating parts and fasteners to exact specifications.

Crafted from hardened steel with a knurled outer edge for secure handling, this Right Hand gauge targets metric fine threads such as M4 x 0.35 with a 6h tolerance class. Its NoGo design provides dependable wear resistance for repeated use in busy environments.

• Precise metric fine-thread verification (Right-Hand, M4 x 0.35, 6h): Ensures external threads meet exact size and pitch, enabling consistent mating and reliable assembly across parts and batches.
• Durable hardened steel construction: Built to withstand repeated use, resist wear, and maintain accurate measurements in demanding shop conditions.
• Fast, clear Go/NoGo indication: Provides quick pass/fail feedback, reducing inspection time and helping keep production moving with fewer delays.

Used in quality control, assembly, and supplier verification, this gauge helps streamline your workflow by delivering repeatable measurements, minimizing rework, and boosting confidence that threaded components will fit correctly the first time.