• 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
• Interior grade blue-zinc coating
• Shank diameter: 0.315 in. (8.1 mm)
• Length: 4 in. (100 mm)
• Quantity: 25 per package

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 in. and 0.470 in. outer-diameter structural fasteners are designed to pull structural members together while providing excellent connection strength. 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.

• 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
• Interior grade blue-zinc coating
• Shank diameter: 0.315 in. (8.1 mm)
• Length: 4 in. (100 mm)
• Quantity: 25 per package

Install With: Install using 6-lobe T40 or 17-mm hex-head driver bit