A325 Round HD T.C. Bolt Mech Gal W/ A563 DH Heavy (Inch)

Our USA‑manufactured A325 Round Head Tension Control (T.C.) Bolts with Mechanically Galvanized finish are engineered for high‑strength structural steel connections that require precise installation, long‑term durability, and code‑compliant fastening. Designed for use with A563 DH Heavy Hex Nuts, these T.C. bolt assemblies deliver exceptional tensile and shear performance in demanding structural applications, including steel buildings, bridges, industrial frameworks, and major infrastructure projects.

The round, button‑style head and splined end work seamlessly with T.C. installation tools, ensuring accurate, repeatable tensioning for every connection. The mechanical galvanizing provides excellent corrosion resistance without the risk of hydrogen embrittlement associated with some coated fasteners—making these assemblies ideal for outdoor, exposed, and long‑service‑life installations.