Simpson HELI37700A Heli-Tie 3/8" x 7" Helical Wall tie, Pkg 50 Hex Head 410 Stainless Steel Masonry Screws The square-drive recess minimizes cam-out

The square-drive recess minimizes cam-out for secure driving

Compared to a wedge anchor

Versatile Applications: Perfect for pergolas

These heavy-duty connectors are designed for schools and other structures requiring additional strength

Light-duty outdoor structures

Simpson HELI37700A Heli-Tie 3/8" x 7" Helical Wall tie, Pkg 50 Hex Head 410 Stainless Steel Masonry Screws The square-drive recess minimizes cam-outThe Simpson Strong Tie Heli Ties are designed to anchor building facades to structural members such as concrete block. These helical wall ties are made from 304 stainless steel for a long lasting service life and excellent corrosion resistance. The helical design makes installation quick into the predrilled pilot hole. An SDS Plus rotohammer along with the proprietary HELITOOL37A Installation Tool. Installation: Drill pilot hole through the faade