Home / Standards / GB/T 70.3-2023 GB/T 70.3-2023 Active Hexagon socket countersunk head screws with reduced loadability 降低承载能力內六角沉头螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 现行 Issue Date 2023-05-23 Implementation 2023-12-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A