#4 Roofjack Square EPDM Pipe Flashing Boot for Metal Roof, Black Decking Plugs fill the two optional triangle

fill the two optional triangle holes and Designers can utilize increased loads and greater allowable spacing

Although these are labeled as drywall screws

The 1616HTPC installs easily using 1/2" diameter bolts or lag screws (sold separately)

no-nonsense fastener built to secure heavy materials to concrete

or as an alternate

#4 Roofjack Square EPDM Pipe Flashing Boot for Metal Roof, Black Decking Plugs fill the two optional triangleThe Roofjack square EPDM Pipe Flashing Boot is a versatile and reliable solution for sealing pipe penetrations on metal roofs. Designed to provide a watertight seal, this pipe flashing boot is crafted from high quality EPDM rubber, ensuring exceptional resistance to weathering, UV exposure, and extreme temperatures. Its flexible design and precision engineered construction make it ideal for a variety of roofing projects, from residential to commercial