Hexagon socket countersunk head screw is also known as the flat cup inside the hexagonal screw, common in the British system and metric system, commonly used materials are stainless steel and carbon steel. The screw head is round outside the head, and the middle is a concave hexagonal. Its head is a 90-degree vertebra. After installation, the screw head can fall into the mounting surface, keeping the mounting surface level. Hexagon socket countersunk head screw is commonly used in machinery, mainly easy to tighten, disassembly, not easy sliding Angle and other advantages. The inner hexagonal wrench is generally a 90-degree bend, the curved end is long side short, with the short side screw, holding the long side can save a lot of force and can play a good fastening role.We look forward to hearing from you, whether you are a returning customer or a new one. We hope you will find what you are looking for here, if not, please contact us immediately. We pride ourselves on top notch customer service and response. Thank you for your business and support! Corporate goal: Customers' satisfaction is our goal, and sincerely hope to establish long-terms stable cooperative relations with customers to jointly develop the market. Building brilliant tomorrow together!Our company regards "reasonable prices, efficient production time and good after-sales service" as our tenet. We hope to cooperate with more customers for mutual development and benefits. We welcome potential buyers to contact us. We look forward to your visit and hope we can cooperate happily!