Black Galvanizing Technology: M3 screw assortment are made of durable 12.9&10.9 grade alloy steel and have black galvanizing technology. They do not contain organic oil. They have clear threads, uniform stress and high strength.They can be used for a long time.
Standardized Metric Size: M3 bolts and nuts kit, each type of nut has four different lengths, a total of 20 common sizes, in line with the standardized metric system, and the average error is less than 0.01mm.
Multi Head Style: Our set contains two types of screws, the package contains 280 cup head screws and 280 button screws, 1680 pcs M3 screws with nuts and washers combination, enough for daily needs, 1 hex wrenches customized for each head are provided in the kit to make the screws easier to use.
Thickened Storage Box:Our metric machine screw assortment comes in a reinforced box with thickened retaining dividers to keep all components organized clearly labeled on inner and outer covers for easy storage and access,and comes with bubble film to ensure that transportation will not be damaged or scattered.
Wide Applications:This metric bolts and nuts assortment can be widely used in 3D printers, classified instruments, meters, electronic products, household appliances and more, suitable for professionals, amateurs and repairers, it can meet your life repair needs.