Screw, Bolts, Nuts manufacturer / supplier in China, offering Class 4/8/10/12 Galvanzied Carbon Steel DIN934 Hex Nuts M3-M48 High-Strength Black HDG Zinc/Nickel/Copper Plated Nuts M3-M64, Black B7 Threaded Studs Optimized for Steel Structure Projects, DIN975 Standard Full Threaded Rod Zinc Plated M8 Hardware and so on.