metal bolt 3d model

Create a high-detail 3D model of a metallic industrial screw fitting. The object has a cylindrical threaded lower section with precise, sharp helical threads. Above the threaded section is a thick hexagonal nut base, and on top of that another smaller hex nut section stacked vertically. The top extends into a smooth cylindrical rod. The material is polished stainless steel with realistic reflections, brushed metal texture, and subtle surface imperfections. Industrial mechanical component, accurate proportions, centered object, neutral background, studio lighting, photorealistic render, high resolution, sharp edges, CAD-style precision, engineering product visualization.