Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering ASTM A193 Gr B7 A320 Gr L7 L7m API 20e Bsl 1 Bsl 3 API 20f Stud Bolt, 1"-8 2"-8 6"-8 ASTM A193 Gr B7 A320 Gr L7 L7m API 20e Stud Bolt, API 20e 20f Bsl3 B7 L7 Yellow Zinc PTFE Black Stud Bolt and A194 Nuts and so on.
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