1000pcs) DIN 6923 M4 Hexagon Flange Nuts with Serration A4 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP692344: Amazon.com: Industrial & Scientific
10 M14-2.0 Hexagon Flange Nut - Non-Serrated Class 10 Zinc. DIN 6923: Amazon.com: Industrial & Scientific
400pcs) DIN 6923 M8 Hexagon Flange Nuts Without Serration A2 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP6923208: Amazon.com: Industrial & Scientific
M8 x 1.25 Coarse Thread DIN 6923 / ISO 4161 Class 8 Hex Flange Nut with Serration Medium Carbon Steel Zinc Plated Pk 50: Amazon.com: Industrial & Scientific