Thread Diameter: #14; Length: 4"; Head Height: 0.21" (5.4mm); Flange Diameter: 0.48" (12.3mm); Washer Size: 0.61" (15.5mm); Package: 50 PCS Black Metal Roofing Screws with a Hex Bit Socket.
Material: Both the screw and the metal washer are made of carbon steel with black coating, which is corrosion-resistant and anti-rust, not easy to damage. The black washer is made of EPDM, which is wear and oxidation resistant.
Feature: The EPDM rubber washer can prevent leaks, loosening and damage the contact surface, which is bonded to the metal washer forming a tight sealing when you tighten the self-drilling screw.
Easy to Use: The self-drilling screws can be directly screwed into the metal or wood without pre-drilling, not easy to deform and slide when use, high strength, long service life. All you need to install them with a power drive tool.
Wide Application: The hex head metal roofing screws are typically used in metal-to-metal and metal-to-wood applications, most commonly on thin metals such as iron panel, steel plate, aluminum panel, also used in wood, plastic sheet, composite board, etc.