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Lag Screws

For over a century, Rettig’s Industrial Supply has been dedicated to providing high-quality industrial supplies with excellent customer service at competitive prices. After you place your order, our in-stock inventory ships within twenty-four business hours.

 
Low Carbon Lag Screw Plain Finish
Inch Sizes Hex Head Plain Finish
Low Carbon Hot Dipped Galvanized Lag Screw
Inch Sizes Hex Head Galvanized Plated
Low Carbon Clear Zinc Cr3 Lag Screw
Inch Sizes Hex Head Clear Zinc Cr3 Plating
18-8 Stainless Steel Lag Screw
Inch Sizes Hex Head 18-8 Stainless Steel

Lag screws, also known as lag bolts, are some of the strongest fasteners available for wood-to-wood and wood-to-metal connections. Designed for heavy-duty applications, these screws have a hex head and are driven in using a wrench or socket rather than a screwdriver. They're ideal for use in construction, decking, framing, structural supports, and outdoor projects where strength and holding power are critical.

Common Types of Lag Screws:

  1. Standard Hex Head Lag Screws
    These are the most commonly used, featuring a coarse thread and a sharp point that cuts into wood or soft metal. Typically made from carbon steel, they’re available in plain, zinc-plated, and hot-dip galvanized finishes to suit indoor or outdoor environments.

  2. Stainless Steel Lag Screws
    Used in marine, coastal, or corrosive environments, stainless steel lag screws (usually 18-8 or 316) offer excellent corrosion resistance and are ideal for outdoor decks, docks, and structures exposed to moisture.

  3. Structural Lag Screws (a.k.a. Structural Wood Screws)
    These modern alternatives to traditional lag bolts often have self-tapping threads, torx or star drive heads, and meet ICC code requirements. They're faster to install and don't require pre-drilling in many cases.

  4. Silicon Bronze Lag Screws
    Used in specialty applications like historic restorations or boatbuilding, these offer a combination of corrosion resistance and aesthetic appeal.

Specifications to Consider:

  • Sizes: Typically range from 1/4" to 3/4" diameter and 1" to 12"+ lengths

  • Material: Steel, stainless steel, silicon bronze

  • Thread Type: Coarse thread, partial thread shank

  • Finish: Zinc, hot-dip galvanized, stainless, or coated for exterior use

When strength, durability, and performance matter, choosing the right type of lag screw is key. Need help matching your application with the perfect fastener? Our team is ready to assist!

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