Round head machine screws, hex socket drive. Metric machine screws for universal use.
304 Stainless steel hex socket round head screw used extensively where fasten is needed.
High Quality: Zinc plated makes it rust resistance and corrosion resistance allows you to use them for a long time.
Widely used in wind power industry, the aerospace industry, office equipment industry, petrochemical industry, the electronics industry, the communications industry, ship building industry, environmental protection machinery, etc.