Amazon.com: (5) M12-1.5 Metric FINE Thread Flange Hex Nut 12mm x 1.5 DIN 6923 : Industrial & Scientific
500pcs) DIN 6923 M5 Hexagon Flange Nuts Without Serration A4 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP6923405: Amazon.com: Industrial & Scientific
Amazon.com: 10 M12-1.75 Hex Flange Nut, Class 10, Serrated, Black Oxide. DIN 6923 : Industrial & Scientific
Amazon.com: 5 M14-1.5 Hexagon Flange Nut - Non-Serrated Class 10 Zinc. DIN 6923 / ISO 4161 : Industrial & Scientific
Amazon.com: 5 M16-2.0 Hexagon Flange Nut - Non-Serrated Class 10 Zinc. DIN 6923 / ISO 4161 : Industrial & Scientific
Amazon.com: 1 M24-3.0 Hexagon Flange Nut - Non-Serrated Class 8 Zinc. DIN 6923 / ISO 4161 : Industrial & Scientific