Home / Standards / GBT 802.3-2009 GBT 802.3-2009 Hexagon flange cap nuts — Weld type 六角法兰面盖形螺母 焊接型 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A