To the threadedfasteners which bear important load, we should ensure that the the same clamping force was produced no matter how to change the surface treatment.
对于承受重要载荷的螺纹紧固件，应该保证其表面处理方式不论如何变化，都能产生相同的预紧力。
2
Threaded fastener is the important type among all the fasteners.
螺纹连接件是紧固件中重要的类型。
3
The factory is specializing in producing kinds of nuts and threaded rods of DIN, ANSI, BSW, JIS and UNI and ISO standards. And non-standard fasteners are also our main products.