We supply hex socket flat round head step screws, hexagon aluminum screws and customized non-standard half thread step screws. Made of premium aluminum alloy, featuring light weight, oxidation resistance and excellent corrosion resistance. Designed with flat round head and inner hex socket for easy mounting and concealed flush installation. The step structure enables accurate positioning, spacing and limit fixing. Half thread design perfectly meets special assembly and fastening demands. Precision processed by CNC machining and cold heading, with tight dimensional tolerance, standard smooth thread and burr-free surface. Custom specifications, thread length and step size are available per drawings and samples. Widely applied in electronic devices, furniture hardware, communication fittings and precision machinery assembly. Factory direct supply, support small batch sampling and large quantity wholesale.