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Strong-Drive® SDHR COMBO-HEAD Screw

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 0.394"- and 0.472"-diameter structural fasteners are designed to pull structural members together while providing excellent connection strength — especially when connecting steel plate connectors to wood. The unique “combination” head allows for effortless 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 shaft and Type-17 point for fast starts and low-torque driving.

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)
  • Interior grade blue-zinc coating
  • Available in 4" and 6-1/4" lengths in two diameters: .394" and .472"

    Applications

  • Wall-to-wall, floor-to-floor, support beams, lap joints, ledger connections, steel plate and angle connections.
    • Simpson Strong-Tie SDHR27400 4" 0.590" Head Diameter 0.275" Shank Diameter Combination T40 6-Lobe or Hex-Head 2.15" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (100 ct)
    Simpson Strong-Tie SDHR27400-R25 4" 0.590" Head Diameter 0.275" Shank Diameter Combination T40 6-Lobe or Hex-Head 2.15" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (25 ct)
    Simpson Strong-Tie SDHR27614 6-1/4" 0.590" Head Diameter 0.275" Shank Diameter Combination T40 6-Lobe or Hex-Head 4.30" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (100 ct)
    Simpson Strong-Tie SDHR27400 4" 0.590" Head Diameter 0.275" Shank Diameter Combination T40 6-Lobe or Hex-Head 2.15" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (100 ct)

    $111.32

    Simpson Strong-Tie SDHR27400-R25 4" 0.590" Head Diameter 0.275" Shank Diameter Combination T40 6-Lobe or Hex-Head 2.15" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (25 ct)

    $40.73

    Simpson Strong-Tie SDHR27614 6-1/4" 0.590" Head Diameter 0.275" Shank Diameter Combination T40 6-Lobe or Hex-Head 4.30" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (100 ct)

    $180.70

    Simpson Strong-Tie SDHR27614-R25 6-1/4" 0.590" Head Diameter 0.275" Shank Diameter Combination T40 6-Lobe or Hex-Head 4.30" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (25 ct)
    Simpson Strong-Tie SDHR31400 4" 0.669" Head Diameter 0.315" Shank Diameter Combination T40 6-Lobe or Hex-Head 2.15" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (100 ct)
    Simpson Strong-Tie SDHR31400-R25 4" 0.669" Head Diameter 0.315" Shank Diameter Combination T40 6-Lobe or Hex-Head 2.15" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (25 ct)
    Simpson Strong-Tie SDHR27614-R25 6-1/4" 0.590" Head Diameter 0.275" Shank Diameter Combination T40 6-Lobe or Hex-Head 4.30" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (25 ct)

    $58.08

    Simpson Strong-Tie SDHR31400 4" 0.669" Head Diameter 0.315" Shank Diameter Combination T40 6-Lobe or Hex-Head 2.15" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (100 ct)

    $183.72

    Simpson Strong-Tie SDHR31400-R25 4" 0.669" Head Diameter 0.315" Shank Diameter Combination T40 6-Lobe or Hex-Head 2.15" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (25 ct)

    $58.88

    Simpson Strong-Tie SDHR31614 6-1/4" 0.669" Head Diameter 0.315" Shank Diameter Combination T40 6-Lobe or Hex-Head 4.30" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (100 ct)
    Simpson Strong-Tie SDHR31614-R25 6-1/4" 0.669" Head Diameter 0.315" Shank Diameter Combination T40 6-Lobe or Hex-Head 4.30" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (25 ct)
    Simpson Strong-Tie SDHR31614 6-1/4" 0.669" Head Diameter 0.315" Shank Diameter Combination T40 6-Lobe or Hex-Head 4.30" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (100 ct)

    $282.13

    Simpson Strong-Tie SDHR31614-R25 6-1/4" 0.669" Head Diameter 0.315" Shank Diameter Combination T40 6-Lobe or Hex-Head 4.30" Thread Length Type-17 Point Blue-Zinc Coated Strong-Drive® SDHR COMBO-HEAD Screw (25 ct)

    $83.48



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