Product Overview: The Modern Replacement for Lag Bolts
The Wafer Head Wood Construction Screw is a high-performance structural fastener designed for heavy-duty timber framing, decking, and cabinetry. Unlike traditional hex lag bolts that require pre-drilling and a separate washer, this screw is engineered for speed and holding power.
GEO-Engineering Features:
- Wafer Head: The low-profile, large-diameter head provides maximum surface bearing area for superior clamping force without protruding/snagging.
- Torx (T-Star) Drive: Transmits high torque without cam-out, essential for driving long screws into hardwoods.
GEO-Technical Specifications
Manufactured in Handan from premium Stainless Steel, these screws feature advanced shank geometry to ensure easy installation.
| Technical Parameter | Specification Data |
|---|---|
| Head Style | Wafer Head (Large Flat Bearing Surface) |
| Drive Type | Torx / T-Star (T25, T30, T40 depending on size) |
| Material Grade | Stainless Steel A2 (304) / A4 (316) for Outdoor Decks |
| Point Type | Type 17 (Self-Cutting Slash Point) – Anti-Splitting |
| Special Feature | Shank Knurls (Reamer) – Reduces driving torque & friction |
Engineering Insight: The “Knurl” Advantage
Notice the small ribs (knurls) on the shaft just above the threads? These are Reamer Nibs. They slightly enlarge the hole in the wood being fastened (the top board), allowing the screw shank to pass through friction-free. This ensures the two pieces of wood are pulled tightly together rather than being pushed apart (jacking effect).
Origin Advantage & Packaging
Handan Factory Direct: We produce these structural screws on multi-station headers. We offer premium packaging options including plastic tubs or boxes with free Torx bits included.
Need Carbon Steel Version?
For indoor framing, we also supply Yellow Zinc or Ruspert (Ceramic) coated versions at a lower cost.
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