Sealtite HG Steelbinder screws are self-drilling pole barn screws designed to attach metal roof and sidewall panels to heavy gauge steel on pre-engineered metal buildings. Coated screws feature a tough 2.5 mils of powder coating that will not chalk or fade due to the UV inhibitor in all colored coatings. Fastener lengths over 1-1/4" are designed to penetrate steel thickness up to .500. Thread to point ratio engineered to provide maximum pullout strength in heavy gauge steel. EPDM rubber is vulcanized to a steel washer. Moisture has no place to penetrate. The washer provides a secure seal even when driven at an angle. Applications include metal deck to structural steel or bar joists, & retrofit clips to structural steel.