Founded in the year 2003, HAIYAN YUANYANG STANDARD PIECE CO., LTD. is a
            professional manufacturer of high-quality fasteners. Products range from wood screws
            to bolts in DIN, IFI (AMSE/ANSI), AS, and other ISO standards. Particularly, DIN 571
            coach screws here are the most popular and strongest items in the market. Other main
            products are carriage bolts, hexagon bolts, and hexagon bolts with flange head.
            Moreover, processing with supplied drawing is also available...