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  • 18-8 Stainless Steel Lag Screw

Hex Head Lag Screw 18-8 Stainless Steel

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18-8 Stainless Steel Hex Head Lag Screws – Durable, Corrosion-Resistant Fastening for Demanding Environments

When strength, longevity, and corrosion resistance are non-negotiable, 18-8 stainless steel hex head lag screws are the premium solution. Built for both interior and exterior structural fastening, these lag screws excel in marine environments, outdoor construction, coastal installations, and chemically exposed areas where traditional steel fasteners might fail.

The term 18-8 stainless steel refers to an alloy containing approximately 18% chromium and 8% nickel, offering exceptional corrosion resistance, durability, and a clean, attractive finish. These properties make them perfect for decking, fencing, docks, outdoor furniture, and even architectural or decorative wood applications where appearance and performance matter.

The hex head design allows for high torque and secure driving with a wrench or socket, making them suitable for heavy-duty wood-to-wood or wood-to-masonry connections. Unlike lower-grade materials, 18-8 stainless is naturally resistant to rust, staining, and pitting, even in damp or salt-exposed environments, eliminating the need for additional coatings or finishes.

Specifications & Features:

  • Material: 18-8 stainless steel (corrosion-resistant, non-magnetic in annealed state)

  • Finish: Natural stainless steel – bright, clean appearance

  • Head Style: Hex head for wrench or socket installation

  • Thread Type: Coarse threads for excellent grip in wood

  • Sizes Available: Commonly available from 1/4" to 3/4" in diameter, and lengths from 1" to 12"+

  • Applications: Coastal construction, docks, pergolas, siding, boatbuilding, and food-grade or chemical applications

Whether you're building a waterfront deck or fastening treated lumber in a corrosive setting, 18-8 stainless steel hex lag screws provide long-lasting, rust-free performance with strength you can count on.

Have questions about stainless grades or torque requirements? Contact our fastener specialists today—we’re here to help you build smarter and stronger!