Hex Bolts, Carriage Bolts, Timber Bolts manufacturer / supplier in China, offering DIN427 Stainless Steel SS304 SUS316 A2 A4 Slotted Headless Shoulder Screws, DIN927 Stainless Steel Slotted Headless Shoulder Screw, CNC Milling Turning Parts Machining for Industrial Robot and Ectrical Products and so on.