Lag Screws

South Coast Fasteners, Inc. offers lag screws, also known as lag bolts, built for secure fastening into wood, masonry anchors, and structural framing. These heavy-duty screws feature coarse threads and hex heads that allow for high torque and solid grip during installation. Lag screws are often used where a bolt and nut are not possible but where strong, load-bearing performance is still required. Whether you are anchoring heavy timber, bracing structural panels, or installing equipment into studs or joists, we supply the sizes, grades, and finishes to help you drive it in and trust it will hold.

Your Supplier for High-Performance Industrial Fasteners

If you're looking for a trusted supplier of wholesale industrial fasteners, South Coast Fasteners is your solution. Contact our Anaheim, CA office to learn more about our product options and how we can support your project needs. For helpful service, fast order turnaround, and high-quality fasteners in bulk or small batches, choose South Coast Fasteners.

Material Options

South Coast Fasteners stocks lag screws in material grades that balance cost efficiency, corrosion protection, and long-term performance across residential, commercial, and industrial applications.

A307 Grade A

These low carbon steel lag screws are widely used in residential framing, fence posts, landscaping, and general utility connections. A307 Grade A offers moderate strength and excellent workability, making it a popular choice for straightforward fastening where code does not require a structural-grade bolt.

Grade 2

This entry-level grade is common in agricultural and non-critical wood applications. Grade 2 lag screws are economical and easy to drive, often used in light-duty framing, cabinetry support, or interior blocking where vibration and stress are minimal. Simple, consistent, and readily available in a wide range of sizes.

Grade 5

Heat-treated for higher strength and better torque resistance, Grade 5 lag screws are used when fastening into dense wood, heavy framing, or composite materials that require tighter clamping force. These screws are common in deck framing, structural blocking, and machinery installation where load paths or pullout strength are a concern.

Stainless Steel 18-8

This corrosion-resistant alloy is designed for use in outdoor, marine, or high-moisture environments. Stainless steel lag screws are a preferred option for docks, outdoor framing, fencing, and long-term exterior projects. They offer the strength you need with the appearance and weather protection your job demands.

Available Finishes

South Coast Fasteners offers lag screws with finish options that protect against rust, match visual design goals, and extend the usable life of the fastener.

Black Oxide

A dry indoor finish with a smooth, matte black appearance. Black oxide lag screws are most often used in cabinetry, architectural features, and enclosed fixtures where moisture is minimal and aesthetics are important. The finish reduces glare and blends well with dark wood or metal.

Hot Dip Galvanized

This thick zinc coating is ideal for protecting lag screws in outdoor framing, treated lumber, and marine applications. The finish forms a strong barrier against corrosion and is often specified for deck construction, beam anchoring, or utility mounting where weather exposure is constant.

Plain

Uncoated steel for interior use or jobs where the screws will be painted, sealed, or otherwise protected after installation. Plain finish lag screws are cost-effective and often used in framing, blocking, or controlled environments where rust risk is low.

Yellow Zinc Cr+6

This golden finish provides enhanced corrosion resistance with a high-visibility look that is easy to identify. Yellow zinc lag screws are frequently used in electrical, light framing, or cabinetry applications where appearance, traceability, and protection all factor into the choice.

Zinc Cr+3

A bright, silver-toned finish that provides dependable rust resistance for everyday use. Zinc Cr+3 lag screws are common in shop environments, interior wood assemblies, and equipment setups where a clean, professional appearance is preferred and consistent performance is required.

Why Choose South Coast Fasteners?

At South Coast Fasteners, we know that when a lag screw is going in, it needs to hold. There is no room for stripped heads, soft threads, or mismatched sizing. That's why we supply the grades, diameters, and coatings that line up with what builders and contractors actually use. Whether you are working in the field, the shop, or the garage, we will get you the right lag bolt with no guesswork and no delays.

Order Lag Screws Online Today

South Coast Fasteners makes it easy to order lag screws in the exact length, diameter, and finish your job requires. Browse our online inventory for standard and stainless lag screws, or reach out for help with application specs, volume pricing, or shipping timelines. We are ready to support your build from the first pilot hole to the final turn of the wrench.