A calibrated steel hexagon bar https://ukrstarline.ua/ru/chernyj-metalloprokat/stalnoj-shestigrannik/stalnoj-shestigrannik-kalibrovannyj is a precisely shaped metal product with tight dimensional tolerances and smooth surfaces. It is manufactured by cold drawing or machining, resulting in improved accuracy and hardness. The hexagonal form allows easy wrench grip and consistent rotation torque in fasteners and mechanical assemblies. This product is widely used for bolts, shafts, and tooling parts requiring high strength and precise geometry.