Specifications High-concerned chemical:None Dimensions:M3*14 DIY Supplies:Metalworking Model Number:M3x6/8/10/12/16/20/25/30mm Material:Stainless Steel Origin: China p{margin-block-start: 0; margin-block-end: 0} Product Details - This M3 screw combination kit comes with 560 components, including 140 M3 bolts, 140 hex nuts, 140 flat washers, 140 spring washers, and 1 mini wrench. This complete M3 fastener set is perfect for 3D printers, electronic devices, RC models, DIY repairs, and CNC machinery. Standard Metric Sizes - The M3 hexagon socket head screw combination kit comes with 8 commonly used lengths - M3-0.5 x 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 30mm, M3 bolt pitch 0.5mm - very suitable for daily installation and maintenance. They conform to standard metric specifications with an average error of less than 0.01mm. The M3 bolt and nut combination kit is made of high-quality 304 stainless steel, which is corrosion-resistant and rust resistant, with smooth threads and high hardness, ensuring firm fastening and strong load-bearing capacity. It can be used for a long time under various conditions. Storage Box - The 3mm screw set adopts a partition box with clear labels, making it easy to quickly connect bolts, washers, and nuts. Keep your workspace tidy, accelerate project progress, and make every task smoother.