0.315" x 4" Strong-Drive SDHR Combo-Head Screw - Zinc, Pkg 100 16 Gauge Straight T-Head Finish Nails and applications with moderate exposure

and applications with moderate exposure to moisture

S/HDS and S/HDB holdowns can be welded per Designer’s recommendation and specification

helping save time and improve accuracy

collated design that speeds up repetitive fastening tasks

Corrosion Resistance: Built to perform in exposed outdoor environments

0.315" x 4" Strong-Drive SDHR Combo-Head Screw - Zinc, Pkg 100 16 Gauge Straight T-Head Finish Nails and applications with moderate exposureThe Simpson Strong Tie Strong Drive SDHR Combo Head Screw is made for serious wood projects like cross laminated timber (CLT), mass timber, and other big framing jobs. The unique combo head design gives you flexibility, with a choice to drive it with either a hex bit or a T40 6 lobe bit. A knurled shank helps lock the screw in place, and the sharp Type 17 point starts fast, reduces driving torque, and often eliminates the need for predrilling.