CNC Machined Part, Bolts, Screws manufacturer / supplier in China, offering Precision CNC Machined 6061-T6 Aluminum Parts for OEM Orders, DIN 653, Steel Flat Cylindrical/Cap Head Hand Knurled Thumb Screws/Captive Screws, Ss Straight Knurled Head Thumb Knobs Captive Screws and so on.