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 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.