China 'GB/T 2878.4-2011
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 2878.4-2011
Connections for hydraulic fluid power - Ports and stud ends with metric threads and O-ring sealing - Part 4: Hex plugs 液压传动连接 带米制螺纹和O形圈密封的油口和螺柱端 第4部分:六角螺塞
Issued Date:2011-12-30
Implemented Date:2012-10-01
Issued by:
The Standardization Administration of the People's Republic of China