Home / Standards / GB/T 22028-2008 GB/T 22028-2008 Active Hot-dip galvanized screw threads - On internal screw threads there is the clearance for accommodating the hot-dip galvanized coat 热浸镀锌螺纹 在内螺纹上容纳镀锌层 Standard Type GBT ICS 21.040.10 CCS J04 Status 现行 Issue Date 2008-06-19 Implementation 2009-01-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委