Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering High Quality Hot Galvanized Steel Hex Bolt and Nut, OEM/ODM Pernos Overlength A320 L7 PTFE 2507 Mechanical Serrated API 20e/20f High Strength 12 Point Flange Bolt, ASTM SA-193 Gr. ASME B18.2.1 B8m Stud Bolt with Nuts with PTFE and so on.