10pcs M4 M5 M6 Black Grade 8.8 Steel DIN7984 Metric Hex Hexagon Socket Thin Low Short Profile Head Allen Cap Screw Bolt L=6-50mm (Thread Diameter: M6 - Length: 12mm): Amazon.com: Industrial &
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Amazon.com: M5-0.8X10 Metric Din 6921 Class 8.8 Indent Hex Flanged Washer Serrated Screw Full Thread Zinc (Pack Qty 5,500) BC-M510MWW8 by Korpek : Industrial & Scientific