Fasteners, CNC Parts, Hex Bolts manufacturer / supplier in China, offering Brass Insert Nut Knurled Threaded Insert Nut for 3D Print Embedment Nut, Nylon Hex Socket Screws & Cylindrical Heads Knurled Hand Bolts White/Black Plastic Cup Heads Screws, DIN 912 Stainless Steel A2 Cylindrical Head Allen Bolts Hex Socket Head Cap Screws and so on.