2012DL/T 284-2012 Hot-dip galvanized bolts and nuts for tower And hardware of transmission lines
2002DL/T 764.4-2002 Cold forging hot dip galvanizing bolt and nut for tower and hardware of transmission lines
DL/T 764.4-2002 Cold forging hot dip galvanizing bolt and nut for tower and hardware of transmission lines was changed to DL/T 284-2012 Hot-dip galvanized bolts and nuts for tower And hardware of transmission lines.