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M1.6 M2 M2.5 M3 M4 Carbon Steel Hexagon Socket Head Cap Screws Hex Socket Screw Metric Bike Screw

M1.6 M2 M2.5 M3 M4 Carbon Steel Hexagon Socket Head Cap Screws Hex Socket Screw Metric Bike Screw
  Standard:ASME/ANSI B 18.2.1,IFI149,DIN931,DIN933,DIN558, DIN601,DIN960, DIN961, ISO4014,ISO4017Diameter:1/4"-2 1/2",M4...

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