Hello! We are a factory supplier of ISO7380 Carbon Steel Black Finish Hex Socket Button Head Screw and Allen Hex Screws. Our product is made from high-quality materials to ensure durability and long-lasting performance. The Black Finish provides added protection against corrosion and rust. Our Hex Socket Button Head Screws are easy to install and provide a strong and secure hold, while our Allen Hex Screws are perfect for applications requiring precise tightening. As a factory supplier, we are able to provide custom sizes and quantities to meet your specific needs. Choose us for reliable, high-quality screws that will make your projects a success!