Hex Lag Screw, Machine Screw, Hex Socket Cap Screw manufacturer / supplier in China, offering ASME/ANSI B18.2.2 Hex Nut with Yellow Zinc Gr. 8 1/4"-20, DIN935 Hexagon Slotted Nuts and Castle Nuts with Zinc Plated Factory 20 Years Experience, Hex Washer Hight Head Screw with Cut Point 15 Years Factory and so on.