The Asimeto Ring Thread Gauge (NoGo) is a precision metric tool designed for machinists, quality control technicians, and engineers who need exact verification of M39 x 3 right-hand threads to the 6g class. Its NoGo designation provides a clear, fast check to confirm whether a fastener’s pitch diameter is within spec.

• Series: 686 Series ring gauges crafted for reliable, long-lasting performance in demanding workshop environments.
• Thread size: M39 x 3, right-hand threads, aligned with standard metric fastener specifications.
• Thread direction: Right-hand threading to match common fastener designs.
• Tolerance class: 6g metric tolerance, ensuring precise measurement of the thread pitch diameter.
• NoGo designation: Determines if threads are too large or out of tolerance; a fastener that cannot pass through the gauge indicates an oversized pitch diameter.
• Material and construction: Built from high-quality materials to deliver durability and consistent performance over time.
• Application: Ideal for quality control in manufacturing, assembly lines, and machining environments where accurate thread verification is essential.

Using this NoGo gauge provides a decisive pass/fail result that helps prevent undersized or oversized fasteners from entering critical joints. It supports safer, more reliable connections by confirming that the thread pitch diameter stays within the designated 6g tolerance. The durable build withstands daily workshop use, while its precise metrics offer confidence during inspection, maintenance, and repair tasks. For complete tolerance verification, pair it with complementary Go gauges to cover the full spectrum of thread acceptance.