... :DIN931,DIN933. 2)Material:SS304,SS316. Stainless Steel Flat Head BoltFeatures:1)Standard:DIN931,DIN933,DIN EN ISO 4014,DIN EN ISO ... 4017,ASME B18.2.1,JIS B 1180/1181,BS41902 ... hardware, electronic and electrical appliances,automobiles and so on. stainless steel flat head bolt