1)Stud 2)Material: Carbon steel, B7, 42CrMo 3)Surface: Plain, Black, HDG, Dacromet, etc 4)Reliable quality We have nearly 40 years experience in producing high strength fasteners, our products be widely used in Wind Power field, Steam Turbine, High-speed Train, Petroleum and Petrochemical field, etc..1) Product name: double end stud2) Size: M16-M1503) Material: B7, 42CrMo, etc4) Standard: DIN, ...