cnc machine part 1.machine screw size,M3-M36 2.carbon, stainless steel 3.zinc plated,black,etc 4.flat,pan, etc. cnc machining part ... years technical experiences, we are engaged in the hardware for many years,we have been in constant pursuit continous progress.6.We ... commit ourself to smile to each customer1)Details: Product name cnc machining part ...