螺杆和螺柱 ? 牙条 Threaded rod DIN 975 ? 螺杆 Metric thread stud bolts DIN 976-1 ? 螺杆—过盈配合螺纹 Metric interference-fit thread stud bolts DIN 976-2 ? Welding studs for turnbuckles DIN 34828 ? High-strength structural bolting assemblies. For preloading DIN EN 14399-3 ? High-strength structural bolting assemblies. For preloading DIN EN 14399-4 ? Hexagon bolts with flange-Small series DI