Simpson 0.275 x 12" Strong-Drive SDWH TIMBER-HEX Stainless Steel Screw BC Post Base Why is the duplex head

Why is the duplex head style beneficial for certain applications

511 is designed specifically for structural composite lumber (SCL) header applications

standoff to help prevent post-end rot and a slotted anchor hole for precise placement flexibility

Member Size: 6-3/4 in

The BC40SS is designed for a nominal 4x post size

Simpson 0.275 x 12" Strong-Drive SDWH TIMBER-HEX Stainless Steel Screw BC Post Base Why is the duplex headModel No. SDWH271200SS Finish. Type 316 Stainless Steel Length. 12 Head Diameter (in.) 0. 655 Shank Diameter (in.) 0. 275 Drive Type. 1 2 in. Hex Head Type. Hex Washer Head Thread Type. Box Threads Thread Length (in.) 3 Point Type. Sharp Point The Strong Drive SDWH TIMBER HEX SS screw is a stainless steel structural fasteners designed for lag screw replacement. These 0. 185" and 0. 275" diameter hex head fasteners require no predrilling, making them