The JBO Thread Ring Gauge (NoGo) – Metric Fine, Right Hand, 6g, M64 x 4 – is a precision tool designed to verify external thread diameters on fasteners, fittings, and other threaded components. It is ideal for production lines, machine shops, and QA labs, offering a quick, reliable way to confirm parts meet the M64 x 4 metric fine thread standard and to identify non-conforming parts at a glance.

• Durable Hardened Steel Construction: Built to withstand daily shop-floor use, resisting wear and preserving dimensional accuracy over many inspections.
• Efficient Go/No-Go Verification: Quickly determines whether a thread is within tolerance, speeding inspections, reducing guesswork, and improving throughput.
• Metric Fine, Right-Hand M64 x 4 Alignment (6g): Precisely matched to the M64 x 4 metric fine, right-hand thread with 6g tolerance, ensuring repeatable, meaningful measurements that align with your existing components and calibration routines.

With the JBO Thread Ring Gauge, you can streamline quality checks, minimize rework, and keep production moving. The durable construction ensures long-term reliability in busy environments, while the clear go/no-go feedback helps technicians and inspectors make fast, confident decisions. By standardizing measurements to the M64 x 4 right-hand thread, this gauge supports consistent results across parts, operators, and shifts, improving overall accuracy and efficiency in your quality control process.