M3 Alloy Steel Allen Hex Socket Cap Head Screw Bolt Grade12.9 50pcs 16mm

Specification : Material : Iron Color :Black Hardness : 12.9 Grade Model ：M3 Thread diameter：3mm Head diameter：5.5mm Head Thickness ：3mm Pitch：0.5mm Hexagon wrench size：2mm Screws length optional (Unit :mm)：6/8/12/14/16/18/30/35/40 Note : the screws length less than 30mm it have all through thread more than 30mm it have half thread. details you can see the pictures. due to the different model it may have a little different about the thread please leave a message to us if you want to know the detail about the screws Package included:50pcs Hexagon Screws