820Pcs Screw Assortment Kit, M2-M4 Stainless Steel Hex Button Cap Bolts | With Nuts & Flat Washers & Lock Washers & Wrench, Corrosion Resistant, Length 4-20mm, for 3D Printing, DIY, Home

820Pcs Screw Assortment Kit, M2-M4 Stainless Steel Hex Button Cap Bolts | With Nuts & Flat Washers & Lock Washers & Wrench, Corrosion Resistant, Length 4-20mm, for 3D Printing, DIY, Home

• ?‍?【High Quality Material】 – Made of 100% 304 stainless steel, anti-rust and corrosion resistant for a long time use. With the finest manufacturing techniques, LuKaiSen screws and nuts sets have a smooth, burr-free surface. There are very sturdy, eco-friendly and use a long time.
• ?‍?【Perfect Combination Set】 – There are a total of 820 pieces 304 stainless steel screws and nuts sets in 3 sizes: M2, M3, M4 with matching nuts, flat washers and spring washers meet different people’s demands. These sizes contain almost the 3 most commonly used sizes in our life, such as precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc.
• ?‍?【Convenient and Thickening Box】 - We want our customers to be simple and clear every time they use screws and nuts, so we put 27 types bolt, nut, flat washer, spring washer in 24 grids and each grid is marked with size label. We also provide three free relevant wrenches in our sets So you no longer need the extra purchase.
• ?‍?【1:1 Matching Lock Washer】 – As we all know, nuts and flat washers increase the contact area and reduce stress to protect the screws and parts. And inside the LuKaiSen screws and nuts kit, we have added extra spring washers to prevent bolt loosening.
• ?‍?【100% SATISFACTION GUARANTEE】 – Quality problems occur within 1 year replacement, lifetime warranty, if you're not completely satisfied, please feel free to CONTACT US and we will give you a 100% refund within 30 days of purchase. No questions asked!!