Simpson self-drilling wafer-head screw with wings are made with type 410 stainless steel. Wings above drill point provide clearance hole in work piece so it won't climb up the shank. Wings break off as point engages the steel substrate.
#10 x 1-7/16" Self-Drilling Wafer-Head Screw with Wings - 410 Stainless Steel, Pkg 1000
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