About this item

• Black Galvanizing Technology: Metric screw varieties are made of durable 12.9 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 under all-weather conditions.
• Standardized Metric Size:M2 M3 M4 M5 bolts and nuts kit, each type of nut has four different lengths, a total of 16 common sizes, in line with the standardized metric system, and the average error is less than 0.01mm.
• Larger Quantity :2020 pcs M2 M3 M4 M5 screws with nuts and washers combination, enough for daily needs, 4 hex wrenches customized for each size 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.