The OMG Purlin Fastener is designed for attaching single-ply membrane systems to structural steel purlins in standing seam metal roof retrofit applications. The OMG Purlin Fastener has a drill point which allows the screw to quickly drill through the purlin before the threads engage into the standing seam metal roof. This greatly reduces point burnout or breakage and eliminates "jacking" between purlin and standing seam metal.