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Hex Head Wood Screws, Lag Screws & Hex Lag Bolts - Durable Fasteners from China Suppliers and Factory
Product Overview
| Product Name | Hex Head Wood Screw / Lag Screw / Lag Bolt |
| Head Type | Hexagon Head |
| Drive Type | External Hex Drive (wrench or socket) |
| Thread Type | Coarse Thread (partial thread for maximum grip) |
| Standards | DIN 571 / ANSI / Customized |
| Material | Carbon Steel / Stainless Steel (SS304 / SS316) |
| Surface Finish | Zinc Plated (Yellow / Blue / White) / Hot-Dip Galvanized / Black Oxide / Ruspert / Dacromet |
| Size Range | Diameter: M6 – M12 Length: 20mm – 200mm (or customized) |
Product Features
Hexagonal head allows high torque tightening
Deep threads provide strong grip in wood
Ideal for load-bearing, structural applications
Available with corrosion-resistant coatings for outdoor use
Easy installation using a wrench or impact driver
High tensile strength and excellent durability
Applications
Timber construction and wood framing
Decks, fences, pergolas, and outdoor structures
Wood-to-metal or wood-to-concrete attachments (with anchors)
Furniture and heavy-duty carpentry
Industrial and agricultural wood structures
Packaging & Delivery
| Packaging | Bulk cartons or small boxes OEM packing with your label or barcode |
| Lead Time | 7–20 days depending on order size |
| Shipping Port | Tianjin, China |
Why Choose Hebei Chudu
Factory-direct supply with competitive prices
Large inventory of standard hex lag screws
Strict quality control – ISO 9001 certified
Custom sizes and finishes accepted
Trusted exporter to Europe, Middle East, Southeast Asia, and more
Frequently Asked Questions
What is the difference between a lag screw and a lag bolt?
They refer to the same heavy-duty fastener. While traditionally called "lag bolts" because of their hex heads, they are technically "lag screws" because they feature sharp, deep wood screw threads designed to drive directly into timber without a nut.
Do I need to drill a pilot hole for hex wood screws?
Yes, drilling a pilot hole is highly recommended when installing hex lag screws. This prevents the wood from splitting, ensures correct alignment, and reduces the torque required to drive the screw in.
Which surface finish is best for outdoor applications?
For outdoor or high-moisture environments, Hot-Dip Galvanized (HDG) or Stainless Steel (SS304/SS316) finishes offer the best corrosion resistance. Standard Zinc Plating is ideal for indoor or dry environments.
Can these lag screws be installed in concrete or masonry?
Yes. While designed primarily for wood, hex lag screws can be used to attach wood structures to concrete or brick walls when paired with appropriate lag shields or expansion anchors.
Do you accept custom dimensions and standards?
Yes. Besides standard DIN 571 and ANSI specifications, Hebei Chudu offers custom manufacturing for specific diameters, lengths, thread pitches, and surface treatment requirements.