Simpson #8 x 1-5/8" Square Drive, Self-Drilling Fiber-Cement Screw, 410 Stainless Steel Chamfering The PPHD11516B-4K uses a T25

The PPHD11516B-4K uses a T25 6-lobe drive recess

less obtrusive connection without sacrificing structural performance

Type 316 Stainless Steel by Simpson delivers a clean

and extending the usable life of the driver bit across a full installation

What does the enclosed gearbox with helical cut gears offer compared to standard spur gear designs

Simpson #8 x 1-5/8" Square Drive, Self-Drilling Fiber-Cement Screw, 410 Stainless Steel Chamfering The PPHD11516B-4K uses a T25Simpson #8 x 1 5 8" Square Drive Self Drilling Fiber Cement Screw in Type 410 Stainless Steel is engineered by Simpson Strong Tie for reliable fastening of fiber cement siding through furring strips directly into steel studs. Built from Type 410 stainless steel a material that can be hardened through heat treatment to deliver the drilling force needed to penetrate metal these screws combine purpose built design with the strength requirements of