Strong-Drive® SDHR Combo-Head Screw

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
  • View More Product Details
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Items
sdhr-combo.jpg

0.275" x 4" (2-1/8" Thread Length) Simpson Strong-Drive® SDHR Combo-Head Screw, T40 6-Lobe or Hex Drive, Combination Head, Type-17 Point, Blue-Zinc Coated, 100/pk
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sdhr-combo.jpg

0.275" x 4" (2-1/8" Thread Length) Simpson Strong-Drive® SDHR Combo-Head Screw, T40 6-Lobe or Hex Drive, Combination Head, Type-17 Point, Blue-Zinc Coated, 25/pk
Price {QUOTE}
sdhr-combo.jpg

0.275" x 6-1/4" (4-3/8" Thread Length) Simpson Strong-Drive® SDHR Combo-Head Screw, T40 6-Lobe or Hex Drive, Combination Head, Type-17 Point, Blue-Zinc Coated, 100/pk
Price {QUOTE}
sdhr-combo.jpg

0.275" x 6-1/4" (4-3/8" Thread Length) Simpson Strong-Drive® SDHR Combo-Head Screw, T40 6-Lobe or Hex Drive, Combination Head, Type-17 Point, Blue-Zinc Coated, 25/pk
Price {QUOTE}
sdhr-combo.jpg

0.315" x 4" (2-1/8" Thread Length) Simpson Strong-Drive® SDHR Combo-Head Screw, T40 6-Lobe or Hex Drive, Combination Head, Type-17 Point, Blue-Zinc Coated, 100/pk
Price {QUOTE}
Coating N/A Blue-Zinc Coated
- Length N/A 4" N/A 4" N/A 6-1/4" N/A 6-1/4" N/A 4"