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Hex Head Lag Screws Hot Dip Galvanized

• Although technically and functionally a Screw, they are often called “Lag Bolts” on the jobsite. 
• A pre-drilled hole is recommended for installation, especially in hardwoods.
• No mechanical properties such as hardness, proof load, and tensile strength are required for Steel Lag Screws. They are only required to meet the chemical requirements of ASTM A307 Grade A.

Thread Length

• The minimum thread length specified shall be equal to one-half of the nominal screw length plus 0.50 inch, or 6 inches, whichever is shorter. Screws that are too short to meet this thread length formula shall be threaded as close to the head or shoulder as practicable. 
• The dimensional standard specifies only a minimum thread length requirement for Lag Screws. Manufacturers are required to meet this minimum thread length specification but are not required to meet a maximum body length dimension. Therefore, Lag Screws cannot be considered nonconforming based solely on body length dimensions, provided the minimum thread length requirement is satisfied.

HNB's Hot Dip Galvanized Lag Screws feature a thick zinc coating applied by immersing fasteners in molten zinc (~450°C / 840°F), producing a durable, more corrosion resistant surface compared to Zinc Electro Plated Fasteners.

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