10pcs M2 M2.5 M3 M4 M5 M6 M8 M10 Grade 12.9 Carbon Steel Hexagon Hex Socket Headless Cup Point Concave End Set Grub Screw Bolt

10pcs M2 M2.5 M3 M4 M5 M6 M8 M10 Grade 12.9 Carbon Steel Hexagon Hex Socket Headless Cup Point Concave End Set Grub Screw Bolt

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