... 8/8.8/9.8/10.9/12.9 Hex Flange Bolt Description MaterialASTM A193/A320/A193M/A320M B7-L7-B7M ... -L7MSizeM5-M36StandardDIN6921/ISO4162/ANSI Flange BoltsGrade4.8/5.8/8.8/9.8/10.9 ... to oil field and refinery as Steel Pipes, Pipe Fittings, Flange, Valves, Gasket, Petroleum Machinery, Fasteners, UV sterilizer, and so ... with us, and create a bright future together Hex Flange Bolt