Length of Hex Bolt is measured from Under the Head Hex Bolts over 6" long have 6" of thread (PT) = Partial Thread (FT) = Full Thread
Galvanized Hex Bolts are normally used in outside construction projects where corrosion of standard plated fasteners causes a problem. Galvanized Hex Bolts are often used in the construction of Decks and Docks using Pressure Treated Lumber.
