Profile: Haiyan Haiyu Hardware Co.,Ltd. manufactures and exports fasteners & concrete fasteners serving the construction, concrete, fasteners, steel structure, wood and pipe hanging industries. We are an ISO 9001 certified company. Our products include threaded rods, anchors, hex, carriage & hexagon bolts, nuts & washers. We supply a large capacity of threaded rods and foundation bolts products. We also offer ANSI hex machine bolts, hex tap bolts, hex cap screws, hex lags & carriage bolts, hex finished nuts, heavy hex nuts, USS & SAE flat washers.