This series of extra-long hex bolts features lengths ranging from 40 cm to 100 cm, with custom longer sizes available upon request to meet specialized engineering applications. Through multiple rigorous manufacturing processes, the products achieve high strength and high hardness standards, ensuring a stable and reliable structure. The surface treatment has passed extended salt spray testing, delivering excellent corrosion resistance that makes them ideal for outdoor, heavy industrial, and long-term humid environments. Whether standard or non-standard specifications, we offer custom manufacturing based on your drawings.