Washers offer a simple but effective way to protect fastened parts from tension-related damage, such as cracking. With their flat, disc-like shape, they distribute the load of threaded fasteners across a larger area. As you drive a threaded fastener into a set of parts, the washer will evenly distribute the load across a large surface area of the parts. Rather than using a traditional washer, however, you can use a washer head screw.
What Are Washer Head Screws?
Washer head screws are threaded fasteners with an integrated washer. They feature a flanged design that helps to spread the load over a larger area.
Like all screws, washer head screws have a threaded body. Known as the shank, the body is the cylindrical part that’s driven into the parts with which the screw is used. It has exterior threading, which allows it to grip interior threading. Washer head screws, though, are distinguished from other types of screws by their flanged head that acts like a washer.
How Washer Head Screws Work
Washer head screws work by spreading the load across a larger area. The head is flanged to mimic the shape of a washer. As you drive a washer head screw into an object, the load will be distributed across this flanged area.
Damage can occur when driving screws into objects. If you overtighten a screw, for instance, the object may crack or splinter. Damage such as this is particularly common when working with wood. But washers offer a solution to protect parts from damage. Whether it’s a standalone washer or a built-in washer like those found on washer head screws, it will spread the load across a larger area.
Phillips vs Hex Washer Head Screws
You can find washer head screws in different drive types, two of the most common being Phillips and hex. Phillips washer head screws are characterized by a cross-shaped indention on top of the head. You can tighten or loosen them using a Phillips bit.
Hex washer head screws still an integrated washer, but they don’t have a cross-shaped indention like Phillips washer head screws. Instead, they have a hexagonal head, which requires the use of a hex socket wrench.
In Conclusion
Screws are often categorized according to their head style. Truss head screws have a wide and rounded head. Pan head screws have a wide and flat head. Washer head screws, on the other hand, have a flanged head that acts like a washer.
