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Strong-Drive® SDHR COMBO-HEAD Screw 

Strong-Drive® SDHR COMBO-HEAD Screw

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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.

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)
  • 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

Related Literature

Strong-Drive® SDHR COMBO-HEAD Screw
S-F-SDHR20
A flier providing product and installation information about the Strong-Drive® SDHR COMBO-HEAD screw.
Flier
Connectors and Fasteners for Mass Timber Construction Catalog
C-C-MASSTIMBER20
A catalog featuring connectors and fasteners for mass timber construction solutions.
Catalog
Simpson Strong-Tie® Strong-Drive® SDHR COMBO-HEAD Screws
L-F-SDHRCAN20
This letter provides design information for Simpson Strong-Tie Strong-Drive SDHR COMBO-HEAD screws used in steel-to-wood connections in accordance with CSA Standard O86-14 and NBC 2015.
Engineering Letter

Product Information Table

Fastener Production Information and Stuff & Things
New products
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

PDF DWG DXF RFA IFC SAT

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