Bulk 5/16"-9 Hex Lag Screws Low Carbon Steel HDG

Durable, Corrosion-Resistant Fasteners for Secure Wood Connections

Elevate your woodworking, construction, and outdoor projects with our premium 5/16"-9 Hex Lag Screws, crafted from low carbon steel and hot dipped galvanized (HDG) for superior corrosion resistance. These lag screws—often called lag bolts—have a 5/16" diameter and 9 TPI (threads per inch), ensuring strong, long-lasting connections in wood and reliable rust protection in moderate outdoor conditions.

The hex head design allows 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, furniture assembly, and general construction tasks that demand stable, semi-permanent bonds.

Key Benefits of Our HDG Hex Lag Screws

• Corrosion Resistance: Hot dipped galvanizing provides a thick, durable zinc coating for enhanced rust protection.
• High Holding Power: With a 5/16" diameter and 9 TPI coarse threads, these screws ensure stable, long-lasting connections in wood.
• Durable and Cost-Effective: Low carbon steel offers a good 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 secure 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 significant quantities over time.
• Reliable Rust Protection: HDG coating ensures these screws withstand challenging outdoor conditions better than standard zinc coatings.
• Versatile Use: Suitable for moderate 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: Hot Dipped Galvanized (HDG) for enhanced 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 HDG provides improved rust resistance.
• 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 HDG 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.

✔️ Trusted by construction, industrial, and DIY professionals

✔️ Fast shipping and dependable support