DIN and ISO are often interchangeable, but they are not the same.
DIN 7991
Head diameters and heights deviating from ISO 10642 Countersunk hole Ø: 6 mm (M3), 8 mm (M4), 10 mm (M5), 12 mm (M6), 16 mm (M8), 20 mm (M10) etc.
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