
Strong-Drive® SDHR COMBO-HEAD Screw

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Product Details
The Strong-Drive SDHR Combo-Head screw is a structural fastener designed for cross-laminated timber construction, mass timber construction and general interior applications. These partially-threaded, sturdy 0.390"- and 0.470"-diameter structural fasteners are designed to pull structural members together while providing excellent connection strength. The “combination” head allows for driving using either a hex driver bit or T40 6-lobe driver bit. The SDHR Combo-Head has an interior-grade, blue zinc coating, a robust knurled shank and Type-17 point for fast starts and low-torque driving.
Key Features
- Designed for use with steel side plates
- Can be driven by either a hex-head or 6-lobe driver bit
- Heavy-duty, partially threaded shaft with knurl provides strength, with superb pull-out resistance
- Type-17 point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
- Deep T40, 6-lobe recess for a secure drive (replacement bit: BIT40T-134-R2)
- Interior grade blue-zinc coating
Applications
- Steel-to-wood connections
Related Links
Catalog Pages
- Fastener Product Information: C-F-2023 (Fastening Systems), page 99
- Fastener Technical Data and Loads: C-F-2023TECHSUP, pages 138–139
Related Literature
Product Information Table
Model No. | Coating/Material | Length (in.) | Head Diameter (in.) | Shank Diameter (in.) | Drive Type | Head Type | Thread Length | Point Type | Packaging Qty. |
---|---|---|---|---|---|---|---|---|---|
SDHR27400 | Blue-Zinc Coated | 4 | 0.590 | 0.275 | T40 6-Lobe or Hex-Head | Combination | 2.15 | Type-17 Point | 100 |
SDHR27400-R25 | Blue-Zinc Coated | 4 | 0.590 | 0.275 | T40 6-Lobe or Hex-Head | Combination | 2.15 | Type-17 Point | 25 |
SDHR27614 | Blue-Zinc Coated | 6 1/4 | 0.590 | 0.275 | T40 6-Lobe or Hex-Head | Combination | 4.30 | Type-17 Point | 100 |
SDHR27614-R25 | Blue-Zinc Coated | 6 1/4 | 0.590 | 0.275 | T40 6-Lobe or Hex-Head | Combination | 4.30 | Type-17 Point | 25 |
SDHR31400 | Blue-Zinc Coated | 4 | 0.669 | 0.315 | T40 6-Lobe or Hex-Head | Combination | 2.15 | Type-17 Point | 100 |
SDHR31400-R25 | Blue-Zinc Coated | 4 | 0.669 | 0.315 | T40 6-Lobe or Hex-Head | Combination | 2.15 | Type-17 Point | 25 |
SDHR31614 | Blue-Zinc Coated | 6 1/4 | 0.669 | 0.315 | T40 6-Lobe or Hex-Head | Combination | 4.30 | Type-17 Point | 100 |
SDHR31614-R25 | Blue-Zinc Coated | 6 1/4 | 0.669 | 0.315 | T40 6-Lobe or Hex-Head | Combination | 4.30 | Type-17 Point | 25 |
Code Reports & Compliance
Drawings
DWG | DXF | RFA | IFC | SAT | |||
---|---|---|---|---|---|---|---|