Material:S35C Surface Treatment: Zinc-Plated Steel truss head bolts,anchor bolt, round head bolt, zinc plated bolts truss head bolts,S35C anchor bolts, anchor bolt, round head bolt, zinc plated boltsFuction:It is specialized in connecting two sections of -10 series profile .It neess to make a holl and drill screw thread in appointed position for connection before installation. truss head bolts