Most wood screws usually have one of three head shapes. Round head screws have a rounded top with a flat underside and are typically used for affixing thin objects to wood . What kind of screws should you use on your next project? It’s easy to be confused. Screws are undoubtedly the most versatile fasteners used in woodworking, but there are a lot of choices. Wood screws are handy for quickly building jigs and clamping forms, Outdoor Screws, Part 1 : There are some special considerations for projects that will spend the lives out in the weather. Obviously, a good wood finish is important, but woodscrews can also suffer in …

Drywall screws vs. other types of wood screws . From time to time, people criticize me for using drywall screws in so many of my projects. But I really like drywall screws … Lag screws (US) or coach screws (UK, Australia, and New Zealand) (also referred to as lag bolts or coach bolts, although this is a misnomer) are large wood screws .Square-headed and hex-headed lag screws are covered by ASME B18.2.1 standards, and the head is typically an external hex. A typical lag screw can range in diameter from 1 ⁄ 4 in (6.35 mm) to 1 1 ⁄ 4 in (31.75 mm), One and only stripped screw hole repair kit! Fix stripped screw holes in all types of wood less than a minute with the Screw-It-Again wood anchor.

Alternating high and low threads minimize driving torque and allow the screw to hold more material between threads for a stronger hold and better strip-resistance than standard drywall screws for wood . Grip-Rite Phillips Bugle-Head Coarse Thread Sharp Point Polymer Coated Exterior Screws offers ultimate corrosion resistance and long term aesthetics. BEST ANSWER: You will need to go to the manufacturer: L m metal products web site and click on contact to ask them. They do not specifically say on their web site. Just say you can use with heavy mirrors etc.very vague. They are sturdy and should hold at least 25 pounds each if mounted to solid wood .

Also known as Tap-Flex screws , these are made from hardened steel hererate hard material. They have a five-edged shank that presses tightly against the material to form threads and resist loosening.