Doing a metal roof, a shed, or some corrugated siding? You're gonna need the right screws. These Acorn metal-to-wood screws are the real deal. They're #9 gauge, 1.5 inches long, and they come in a handy 250-piece bag. The 'Barn Red' color is a classic for matching many metal roof panels.
They're self-piercing and self-tapping, which means you can usually drive them right through the metal sheet and into the wood framing underneath without needing to pre-drill a hole (saves a ton of time!). They're made from tough, heat-treated steel and are case-hardened so they won't snap off easily. The head is a 1/4\ hex washer head, so you use a hex driver or a socket with a drill - it gives you good torque and won't cam out like a Phillips head might.
The best feature is the attached EPDM rubber washer. When you drive the screw home, this washer compresses and forms a watertight seal around the screw hole, preventing leaks. Super important for a roof! The threads are a 'Hi-Lo' design with a twin lead and a type 17 point, which helps them drive in fast and have awesome pull-out resistance. They're also coated with a dacro finish and then powder-coated over that for corrosion resistance - they passed a 1000-hour salt spray test. Basically, they're built to last through years of weather. Just make sure you're using them for attaching metal to wood (not metal to metal), and you're good to go. A pro-grade screw for a solid DIY job.
