M1.2 M1.4 M1.6 carbon steel black zinc plated partial thread screw

Industry knowledge：

Advantages of CD vein screw

CD vein screw is generally used in mobile phones, computers, electronic watches and other precision electronic products. Its characteristics are that the screw head has CD lines and is bright. When you rotate the screw under the light, you can see the light reflected from the screw surface. Even if the screw is exposed on the surface of the screw shell, it will not feel abrupt. But also for electronic products to add fashion, beauty.