Premium QualityThese hex flat head screws and nut washers are made of 304 stainless steel, which is sturdy, not easy to damage, rust-proof and corrosion-resistant in cold and humid weather, environmentally friendly, no pollution, high hardness and durable for long time use. Easy to UseOur cross head screws assortment kit includes common metric sizes, easily and quickly fix a lost or broken set screw. The threads of the stainless steel hexagon screws are sharp and precise, which is not easy to deform and slip in the working process. Easy to StoreAll the mixed screw packs are organized by size/type in a transparent type plastic storage case to keep it all neat and useful for you to easily find them in series and avoid loss. Convenient to take it wherever you go and take up little space. Wide ApplicationsOur pocket screws are suitable for door handles, classified instruments, machinery industry, electronic products, household appliances, other small repairs around the shop, garage and home furniture fixing, etc. Material: 304 Stainless Steel. Quantity: 500pcs Uses: Mainly used for fixing the connection of aluminum profiles, such as the fixing connection between multi-square slot aluminum profiles. The pressing surface of the pan head hex screw is larger than that of the pan head hex socket screw, and the connection contact surface is larger. The hex socket head wrench is convenient to tighten and can be reliably fixed and connected to the frame composed of aluminum profiles. Type: Hexagon Pan Head (Metric) Thread: M3x0.5 m4x0.7 m5x0.8 Packing size: about 176*102*23 Product net weight: 530 grams Quantity: m3x8: 30 pcs; M4x8: 20pcs; M5x8: 15pcs; M3x12: 30 pcs; M4x12: 20pcs; M5x12: 15pcs; M3x16: 30 pcs; M4x16: 20pcs; M5x16: 10pcs; M3x20: 30 pcs; M4x20: 20pcs: 120pcs; M3 Nuts: 80 pcs; M4 Nuts: 50pcs Note: It does not include other things, the color is based on the first picture, and the other pictures only show the effect. Due to the differences between different monitors, the picture may not reflect the actual color of the item. . due to manual measurement. Please allow the deviation. Thank you! becomeveryrich