● Place of Origin: Ningbo, China ● Model Number: M6-M42 ● products name: hex nuts ● surface: zinc plated ● Grade: 4,6 ● Headmark: S 181, ZYL 8 ● Standard: DIN934 ● Raw material: Q195,Q235,C1035 1. What is the tool for screwing hexagon nuts? The tool for screwing the hexagonal nut is an Allen wrench. 2. What are the advantages and disadvantages of hexagonal nuts? It is widely used, and its characteristic is that the tightening energy is relatively large, but its defect is that there should be sufficient actual operating indoor space during construction. During installation, adjustable wrenches and open-ended wrenches can be used, and all the above wrenches must have relatively large actual operating indoor space. 3. what are other fasteners you can buy from us? Bolts, nuts, washers, threaded rods 4. How to make an order？ Please provide the product you need parameters: 1. You need the product name 2. You need the amount of products 3. You need the material of products 4. You need the product specifications