ASTM A394 Tower Bolts & Nuts both hexagon and square-head zinc-coated steel bolts and atmospheric corrosion-resistant bolts, in nominal thread diameters of 1/2, 5/8, 3/4, 7/8 and 1 inch are used in the construction of transmission towers, substations, and similar steel. ASTM A394 Tower Bolts & Nuts both hexagon and square-head zinc-coated steel bolts and atmospheric corrosion-resistant bolts, in nominal thread diameters of 1/2, 5/8, 3/4, 7/8 and 1 inch are used in the construction of transmission towers, substations, and similar steel. This is where HARDLOCK® nuts provide a proven, engineering-driven solution. Tower structures are exposed to a unique combination of real-world stresses: Standard fastening systems rely on friction, which degrades over time—leading to loss of preload and eventual loosening. With a growing telecommunications industry, BAND-IT supplies engineered fastening solutions that help continues to build the global network infrastructure. Telecommunications steel towers are essential infrastructure, and their safety is paramount—especially during natural disasters such as typhoons and earthquakes. These towers must maintain structural integrity under extreme conditions, and any loosening of components could result in serious. When it comes to tightening anchor rods and leveling bolts in the tower industry look no further than nuts for the ideal solution. These nuts will hold. With a Built in Washer (Actually Machined or Formed From the Raw Stock of the Nut) and a Series of Serrations on the Mating Face. A Serrated Hex Flange Nut is a Perfect Blend of Both a Locking Nut and a Hex Nut. Manufactured from high-grade brass alloy for excellent corrosion resistance in harsh outdoor environments — withstanding moisture, UV exposure, and temperature extremes.