Brief introduction This is Shanghai Zhonglancun International Trading CO.,LTD.. It is authorized by China Commercial Department. We export various screw bolt and nut, including carriage bolt, furniture screw and nut, hex cap screw, eye bolt, hook bolt, u bolt, coach screw, hanger bolt, windows screw, self tapping screw, chipboard screw, drywall screw, roofing screw, machine screw, flange bolt and nut, threads rods, foundation bolt, guardrail...