A method for making a barrel for plate member fastener and installing the barrel in a first metal plate member for enabling the plate member fastener to affix the first metal plate member to a second metal plate member is disclosed to include the step of machining a metal base material into a barrel having a bottom bonding flange and a bottom extension tube around a bottom opening thereof and then affixing a solder mask to the bottom extension tube around the bottom opening and the step of fitting the bottom extension tube of the barrel into a mounting through hole of the first metal plate and abutting the bottom bonding flange of the barrel against a solder paste at the top wall of the first metal plate member and then applying a reflow soldering process to bond the bottom bonding flange of the barrel to the top wall of the first metal plate member.