Metric Steel Hex Nuts with a Zinc Cr+3 Plated finish. These are a standard DIN 934.
M3 : Class 8 / 8.8 steel (similar to Grade 5)
M4 - M10 : Class 10 / 10.9 Steel (Similar to Grade 8)
Nut Size is the size of the screw that the nut is for (example: M8 nut for a M8 screw).
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