Rshuhx M3 M4 M5 M6 Black Flat head Bolt and Nut set Carbon steel material hexagon head Bolts and nuts washer set fully threaded mechanical fasteners (Comes with reusable storage box）500pieces

【Combination Size】Our flat head bolts and nuts washers: M3X10, M3X20, M3X25, M3X30, M4X10, M4X20, M4X25, M4X30, M5X10, M5X20, M5X25, M5X30, M6X10, M6X20, M6X30, M6X40. Total 500pcs, 16 kinds of models. One purchase can meet your diverse needs. Both the bolts and nuts are placed in a transparent plastic box with matching labels, easy to use and install. 【Material】: The machine screw set is made of 10.9 grade carbon steel. Black surface treatment, not easy to rust, moisture-proof, oxidation-resistant, corrosion-resistant, acid and alkali resistant and high hardness 【Details】Our screws and nuts conform to the standard metric system, and the thread pitch is about 1mm. The thread is very smooth, sharp and accurate. It is not easy to deform and slide during work. 【Application】: Screw and nut combination kits can be used in industry, household goods, construction, furniture, automobiles, motorcycles, machinery, equipment maintenance and other DIY projects. Very suitable for replacing damaged and lost screws to meet your daily needs. 【customer service】 If you are receiving the bolt and nut kit for the first time and encounter product issues, please contact us via email. We will solve this problem as soon as possible. If you have any questions or suggestions about our products, you can always contact us via email to provide good service to our customers. This is always our first step.