Leg Screws (Lag Screws) – Rugged Fasteners for Wood & Heavy Framing Applications
Product Description
Leg Screws, also known as Lag Screws or Lag Bolts, are heavy-duty screws with coarse threads designed for wood-to-wood or wood-to-metal connections in high-load structural applications. Featuring a hexagonal head and sharp tapering threads, these screws are used where secure anchoring is needed in wooden substrates, especially in construction, fencing, timber fabrication, and load-bearing structural joints.
SM Fasteners manufactures leg screws in a wide range of sizes and coatings such as hot-dip galvanized (HDG), zinc-plated, black oxide, and stainless steel (A2/A4) to meet both interior and exterior use. Known for their deep penetration and strong grip, our leg screws are ideal for enduring high shear and tension loads in rugged environments.
Applications
Leg Screws are trusted for permanent, high-strength fastening in wooden frameworks. Common uses include:
Timber House Construction & Wooden Framing
Pole & Fence Installations
Heavy Wood Joinery in Pergolas or Beams
Solar Mounting and Roofing Structures
Engineered Wood Components (LVL/Glulam)
Decking, Docks & Marine Applications
Steel Plate to Wood Fastening
Technical Specifications
| Parameter | Details |
|---|---|
| Type | Lag Screws (Hex Head Wood Screws) |
| Standards | DIN 571, ANSI B18.2.1 |
| Material | Mild Steel, Stainless Steel (A2, A4), HDG Steel |
| Grades | 4.6, 8.8, A2-70, A4-80 |
| Finish | Zinc Plated, HDG, Black Oxide, Plain, Polished SS |
| Thread Type | Coarse Wood Thread |
| Size Range | 6mm to 20mm | 1/4” to 3/4” | Length: 30mm to 300mm |
| Head Style | Hex Head (External) |
| Drive Type | Wrench or Socket |
Why Choose Our Leg Screws?
✅ Deep Threads for Aggressive Wood Grip
✅ High Tension and Shear Strength
✅ Anti-Corrosive Coatings for Outdoor Use
✅ Precision Rolled Threads and Hex Formed Heads
✅ Available in HDG, SS 304 & SS 316 for Marine Use
✅ Fast Delivery with Custom Packaging
Packaging and Delivery
Every order is packed with precision and care to meet global shipping or domestic delivery standards.
Packed in small boxes or bulk cartons
Moisture-resistant inner wrapping
Clear labels with size, coating, and grade info
Optional barcode and OEM branding
Export-ready pallets (Fumigated/Heat Treated)
Industries We Serve
Construction and Infrastructure Projects
Fencing and Landscaping Contractors
Timber and Frame Housing
Renewable Energy & Solar Structures
Maritime and Dock Installations
Railways and Bridge Timbering
OEM Builders and Hardware Brands
Documents Supplied
Each shipment is accompanied by necessary documentation for compliance and assurance:
Certificate of Conformity (COC)
Material Test Report (MTR)
Zinc/HDG Thickness Report
Dimensional Inspection Records
Country of Origin & HS Code Info
Packing List and Weight Chart
Request a Quotation
Looking for top-quality Lag/Leg Screws with quick delivery and technical support?
📧 Email: susheel@smfastners.com
📞 Call: +91 8968469570
💬 WhatsApp Chat: Click Here
SM Fasteners – Trusted Indian Manufacturer of High-Performance Screws, Bolts, and Custom Fasteners.