Description

Simpson Strong-Tie SDHR27400 4″ x .275 COMBO-HEAD Structural Timber Screw 100ct

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

Specifications: