Self-Drilling Fastener Having Buttress Threads, Hex Flange Head, Angled Shoulder, and Sealing Washer

A self-drilling fastener for fixing attachments to a roof, comprising:

• a fastener body, comprising:
• a first end and a second end;
• a flanged head at the first end, having a top, at least one side perpendicular to the top, and a flange;
• and
• a cylindrical shank extending from the flanged head toward the second end and having an angled shoulder, at least one buttress thread, a rod portion and a tapered portion integrally formed at the second end, and a cutting portion formed on the rod portion and the tapered portion;
• wherein the tapered portion forms a point at the second end and the cutting portion is configured to cut through sheet metal, and
• a washer, comprising:
• a washer body having an aperture, a top surface, and a bottom surface;
• and
• a sealing ring made from polymeric material disposed on the bottom surface of the washer body;
• wherein the cylindrical shank of the fastener body is configured to fit through the aperture of the washer body and the angled shoulder of the fastener body is configured to interact with the washer body such that when the fastener is tightened to a structure the flanged head imparts a force on the washer and creates a sealed connection.

A fastener, comprising:

• a hex head with a flange;
• an angled shoulder;
• at least one buttress thread;
• a self-drilling tip;
• and
• a sealing washer having a polymeric seal.