High-Tensile HDG Tower & Step Bolts for Transmission Structures

HDG tower bolts comply with ASTM A394 and DIN7990, with short threads to place shear plane on solid bolt shank for better wind resistance. Step bolts adopt centrifugal process for smooth zinc coating to protect climbing workers. Supporting overtapped matched nuts, thick HDG coating delivers over 30 years anti-corrosion performance. Widely used for power transmission towers, 5G monopoles and substation steel frames, packed moisture-proof for export.