Type “S” Fasteners

This is your heavy-duty fastener designed to withstand the stresses of demanding applications.  EPDM rubber is bonded to the steel washer to prevent delaminating, forming a superior seal-even when driven at an angle.  The 5/16″ HWH with bonded sealing washer covers the existing holes completely, creating a watertight seal, even if stretched out by movement of the metal roof.  High-quality mechanical zinc plating provides extended corrosion resistance.