NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 3229-2008
Assembly tools for screws and nuts - Drive ends for hand and machine operated screwdriver bits and connecting parts - Dimensions, torque testing 螺栓螺母用装配工具 手动和机动螺刀头的传动端和连接部件的尺寸及扭矩试验
Issued Date:2008-07-09
Implemented Date:2009-02-01
Issued by:
The Standardization Administration of the People's Republic of China