Newlng M3 M4 M5 M6 Bolts And Nuts Flat And Lock Washers Assortment Kit 520 Pcs Product Details ??M3 M4 M5 M6 Screws and Nuts Set Size?: M3x10, M3x20, M3x30, M4x10, M4x20, M4x30, M5x10, M5x20, M5x30, M6x10, M6x20, M6x40 in different sizes. A total of 520 pieces of screws, nuts, washers and spacers. Bolts and nuts are metric standard, bolts DIN933, nuts DIN934, washers DIN125, spring washers DIN127. ???Material?: The screw set is made of high quality 304 stainless steel, with high strength and good corrosion resistance in harsh environments such as high temperature, cold and high humidity. bolts and nuts set have excellent rust resistance and excellent oxidation resistance to ensure long-term use. ???Complete Screw Set?Our thread screw set comes with a full set of screws and hex nuts, lock rings and washers for more precise installation and increased contact area to reduce stress and protect parts and screws. You can use it appropriately according to actual needs. It will be a good helper for your repair. ???Application?: screws with nuts assortment box Widely used in 3D printer components, home decoration, furniture installation, bicycles and motorcycles, industrial machinery, automobiles, construction, smart device repair ??Convenient Packing?All cylinder head bolts, nuts and washers are put in a durable and sturdy box for storage to avoid loss. By looking at the sticker on the surface of the box, you can quickly find the type of bolt, nut or washer you need. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.