Machining Parts, Hardwares, Screws manufacturer / supplier in China, offering Non-Standard Hollow Vacuum Vented Screw with Hole, Hex Head, Through-Hole Bolt, Custom Aluminum Round Spacers-M3X6 Length 18mm, Plain Finish, Machined Hardware Standoffs, M5 X 16 Pozi Slotted Combo Collar Head, Zinc Coated, Dog Point, Machine Screw and so on.