Many of you were at a loss when you first heard about CD pattern screws. In order to let us to learn more about them, Suzhou Anzhikou Hardware Technology Co., LTD. had sorted out a lot of information about the CD pattern screws:
CD pattern screw alias also called: sun grain screw, smooth grain screw, colorful grain screw. 
CD thread screws are very different from ordinary screws:  
CD grain screw than ordinary screw, brighter, more gloss, will send colorful light, under the irradiation of the sun, rotating CD grain screw surface, its surface will emit countless light, this light is in the screw processing left a circle of circular groove.  
Metal surface requirements for CD screws:  
Because the CD pattern screws' surface are different from ordinary screw, screw the material of screw is CD production requirements, generally applicable to the machining of screw CD for stainless steel materials, stainless steel 302, stainless steel 304, stainless steel 410 the kind of model is applicable to the production of CD pattern screw, Satin brushed screws requirements material plastic medium, the plastic is too low,  Then there will be brittle crack expansion on the surface of the etched CD screw, and the plasticity is too high to produce adhesive tape effect, just like the surface adhesive knife. After changing the combined performance of the material through the vacuum heat treatment process, the processing of CD pattern screw can be carried out. 
Suzhou Anzhikou Hardware Technology Co., LTD. can make the sampels accroding to your requirements and provide the free solution and drawing, if necessary, you are welcome to inquire!