Sun Through is an experienced self drilling screw manufacturer. Different from other suppliers, Sun Through has deep knowledge in steel heat treatment, and owns a heat treatment facility which provides service to many local fastener suppliers.
Sun Through is also one of the earliest companies who started manufacturing bi-metal fasteners. Now many kinds of fasteners can be produced in bi-metal form, including sheet metal screws, self drilling screws, and concrete screws/bolts.
Sun Through is a ISO-9001 certified manufacturer and owns many unique patents and will bring new products to meet industrial dynamic demands....