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Amazon.com: 5 M16-1.5 Hexagon Flange Nut - Non-Serrated Class 10 Zinc DIN 6923 / ISO 4161 : Industrial & Scientific
OPIOL QUALITY® Hexagonal Nuts with Flange and Locking Toothing M3 Made of A2 V2A Stainless Steel According to DIN 6923/ISO 4161 Flange Nuts Flange Nuts Nuts Locking Tooth Nut Rustproof : Amazon.de:
M8-1.25 CLASS 8 HEX FLANGE NUT METRIC COARSE ZINC CR+3 DIN 6923 / ISO 4161 (250/box): Amazon.com: Industrial & Scientific