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Structural lag screws are heavy-duty fasteners designed for high-load wood-to-wood or wood-to-masonry applications, such as deck framing, ledger board installations, and timber structures.
Stainless steel provides maximum protection against corrosion and rust. SS304 is ideal for general outdoor setups, while SS316 is recommended for high-salinity marine environments and harsh chemical exposure.
Yes, traditional lag screws generally require pre-drilling a pilot hole to prevent the wood from splitting and to ensure proper alignment during installation.
These coatings provide an extra barrier against wear and atmospheric moisture, while giving the screws a clean, matte-black aesthetic that blends well with dark timber projects.
As a rule of thumb, the thread length should penetrate at least half to two-thirds of the thickness of the receiving structural member to guarantee a secure, reliable hold.
