High-Tensile HDG Tower Bolts for Transmission Structures

HDG tower bolts comply with ASTM A394 and DIN7990 with short threads to place shear plane on solid shank for higher wind resistance. Over 50μm thick matte zinc alloy coating offers over 30 years anti-corrosion. Supporting overtapped matched nuts for easy high-altitude installation. Step bolts adopt centrifugal process for smooth coating without sharp burrs. Widely used for power transmission towers, 5G telecom poles, packed moisture-proof in cartons or iron kegs for export.