Bulk 5/16" Hex Lag Screws Zinc Plated Steel

Durable, Corrosion-Resistant Fasteners for Secure Wood Connections

Enhance your woodworking, construction, and outdoor projects with our premium 5/16"-9 Hex Lag Screws, crafted from low carbon steel and coated with Zinc CR+3. These lag screws—often called lag bolts—feature a 5/16" diameter and 9 TPI (threads per inch), offering strong, long-lasting wood connections and reliable corrosion resistance in moderate outdoor conditions.

The hex head design allows for easy installation using a wrench or impact driver, while coarse threads and a sharp point ensure maximum grip. Pre-drill pilot holes to prevent splitting and ensure proper alignment. These screws are ideal for moderate wood-to-wood connections, decking, fencing, and other projects demanding stable, semi-permanent bonds.

Key Benefits of Our Zinc CR+3 Hex Lag Screws

• Corrosion Resistance: The Zinc CR+3 coating provides reliable protection against rust in moderate outdoor environments.
• High Holding Power: With a 5/16" diameter and 9 TPI coarse threads, these screws ensure secure, long-lasting connections in wood.
• Durable and Versatile: Low carbon steel offers a cost-effective balance of strength and affordability.
• Easy Installation: Hex head design allows driving with common tools—just pre-drill your pilot hole first.
• Semi-Permanent Bonds: Once installed, these lag screws create connections that resist loosening over time.

Why Choose Our Bulk Lag Screws?

• Bulk Discounts: Ideal for contractors, builders, and large-scale projects seeking volume savings.
• Wholesale Availability: Perfect for B2B customers needing substantial quantities over time.
• Cost-Effective Material: Low carbon steel with Zinc CR+3 provides dependable corrosion resistance at an affordable price.
• Versatile Use: Suitable for wood-to-wood connections, decking, fencing, furniture assembly, and general construction tasks.

Proper Pilot Holes and Installation Tips

Choosing the correct pilot hole size is crucial for preventing wood splitting and ensuring maximum holding power. For detailed guidance, refer to our Lag Bolt Pilot Hole Size Blog.

• Pre-Drilling: Follow recommended pilot hole sizes for best results.
• Use Proper Tools: An impact driver or wrench is best. Avoid over-tightening to prevent head or thread damage.
• Ensure Correct Alignment: Drill pilot holes accurately and straight for optimal holding power and proper installation.

Product Specifications

• Diameter: 5/16"
• Thread Pitch: 9 TPI (Coarse Thread)
• Head Style: Hexagonal Head for easy driving
• Material: Low Carbon Steel
• Coating: Zinc CR+3 for improved corrosion resistance
• Standards Compliance: Meets common industry standards for lag screws

Ideal Applications

• Woodworking Projects: Suitable for moderate beams, framing, and wood-to-wood connections.
• Outdoor Builds: Decking, fencing, pergolas, and garden structures where moderate corrosion resistance suffices.
• General Construction: Perfect for tasks demanding stable, semi-permanent wood connections at a good value.

Buy in Bulk and Build with Confidence

Choose our 5/16"-9 Hex Lag Screws with Zinc CR+3 coating for dependable, corrosion-resistant connections in various construction and woodworking applications. With bulk and wholesale pricing, Monster Bolts delivers top-quality coated fasteners designed to last. Consult our blog for pilot hole size recommendations and install with confidence.

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