This M3 hex socket flat head screws set is made of stainless steel material, good corrosion resistance and rust resistance, durable to use. Widely applied to home furniture, office machines.Features:Made of stainless steel material, durable to use. Equipped with a plastic box, you can classify screws in an organized manner, more convenient to carry and take out. Use this fastener with the hex wrench, hold the mechanical parts firmly in place. Different length M3 screws can be used for different purpose. Used widely in the home and office appliance, furniture and other machinery industry. Specification:Model: Flat Head ScrewMaterial: Stainless steelThread size: M3Application: Electronics industry fastenersWeight: 218g(120pcs), 311g(180pcs)Type: 120pcs/set, 180pcs/set (Optional) Content:120pcs/set:M3*16mm 20pcsM3*20mm 20pcsM3*25mm 20pcsM3*30mm 20pcsM3*35mm 20pcsM3*40mm 20pcsM3 nut 120pcs 180Pcs/set:M3*16mm 30 pcsM3*20mm 30 pcsM3*25mm 30 pcsM3*30mm 30 pcsM3*35mm 30 pcsM3*40mm 30 pcs M3 nut 180pcsPackage Included: 1 set x M3 flat head screws with nuts