＊Instant purchase welcome, midnight silent purchase OK ◎ ＊Please contact us before evaluation if there are any issues.ᐟ.ᐟ 【Size】 Screw diameter: #14 (6.3 mm) Length (excluding hex head): 75 mm Screw pitch: 1.8 mm Hex head size: 10x5.9 mm (hex width x T) Flange diameter: 12.5 mm Washer size: 16 x 3.5 mm (D*T) Drilling range (plate thickness): 2-6 mm Material: Both the screws and metal washers are made of carbon steel with a zinc-plated surface finish for corrosion resistance. The black washer is made of EPDM, which is highly resistant to abrasion and oxidation. Advantages: The hex washer head has a flange and an EPDM rubber washer on the bottom, preventing leaks, loosening, and damage to the mating surface. When tightening the self-drilling screw, the flexible black EPDM rubber washer adhered to the metal washer seals tightly. Easy to use: Unlike self-tapping screws, these self-drilling screws drill a hole and tap the thread in a single operation. Simply install with a power tool. Application: Hex head self-drilling screws are typically used in metal-to-metal and metal-to-wood applications. They are widely used in electrical and industrial applications, and most commonly used for thin metals such as roofing and steel studs. Self-drilling screws #14 x 75 mm Zinc-plated steel Roofing screws Hex head self-drilling screws with EPDM washers for metal-to-metal, 25 pieces #Yue's product list is here ✨☜ 17-28 130/17