Also, the heads have a bugle shape to reduce tearing the paper on drywall. Production or Multi-purpose screws are my absolute favorite types of screws. Common brands include Spax or GRK. These screws are made with hardened steel and are incredibly strong.
They have self-drilling points that eliminate the need for a pilot hole, but I would still pre-drill for critical pieces. Especially near the ends of boards to prevent splitting. Plus, when you buy a box, it comes with a driver bit.
There is really only a single drawback to using these: they are expensive. Maybe twice as much as regular wood screws. The amount of time and frustration these types of screws save is enormous. If you are building outdoor projects, use deck screws. They are made of hardened steel and have a corrosion resistant coating. For even better corrosion resistance, especially on boats and in salty marine environments, you can use stainless steel screws.
While they offer the best protection from the weather, they are not as strong as deck screws and are very expensive. Pocket screws are self drilling and have a wide head that grabs the flat shoulder made by drilling pocket holes. If you use regular wood screws with pocket holes, they may drive all the way through, or possibly split the wood. I use the Kreg pocket screws, but you might be able to substitute pan head screws.
The Kreg screws have a square drive which makes them really easy to seat. Watch my pocket hole basics video to learn a lot more about pocket hole joinery. Machine screws have no points and are intended to use in holes that are already tapped or with a nut. They are threaded along the entire shaft are sold in threads per inch. Usually, sheet metal screws are tiny with a sharp point intended for piercing and driving into sheet metal.
Think of heating ducts for instance. They usually have pan heads and will probably work as a wood screw if you need a substitute. While there are a lot of choices available, there are only a few different types of screws a woodworker will ever need. Know what kind you need for your project before going to the hardware store or home center.
Just buy what you need. I always like to have these on hand. I value your privacy and will protect it. You can learn about how I handle information I collect by viewing my Privacy Policy. January 23, Types of screws and when to use them! The choices of screws can be overwhelming! What types of screws should you use in your projects?
Get flat headed screws, the ones with the tapered heads for countersinking. If you can, use square or star drives. They work better and will save you a lot of frustration. Related Posts Basics Why should you make this push block? According to Wikipedia, machine screws can have a diameter up to 0.
While not as common as wood or machine screws, lag screws are another type of screw worth mentioning. Also known as lag bolts or coach bolts, they are essentially jumbo-sized wood screws coated with zinc. A zinc layer is applied to lag screws to protect them against rust and corrosion. To apply the zinc, companies typically perform electroplating or hot-dip galvanization.
Sheet metal screws, of course, are designed to be driven into sheet metal. They can still be used on other materials, such as wood, but they are primarily used for sheet metal.
Sheet metal screws have threading all the way up to the shank at the top, allowing them to easily dig into sheet metal.
Twinfast screws feature a unique design consisting of two threads rather than just one. With twice the threading, they can be driven into objects twice as quickly when compared to traditional screws. Most drywall screws are twinfast screws. With that said, twinfast screws can be used for other applications besides the installation and hanging of drywall. Finally, security screws are designed to protect against removal or tampering. Rather, they generally require a specialized tool like a spanner or square driver to remove.
There are various types of tamper-resistant screws, all of which offer multiple levels of security:. The most common type of tamper-resistant screw, the pin screw will have the same design as what their regular versions have, such as a cross-shape for a Phillips screw, but with an additional layer of security to prevent easy removal.
Each head will have an additional pin in the design that requires a special tool to install and remove them. A Phillips screwdriver will not work to install or remove a tamper-resistant Phillips screw.
Source: Toolstop. Sentinel screws offer high-level protection because you can only drive them one way. They have a flat head with two small holes that require a special tool to install and remove them.
There are a few more important things to note about different screwheads before you make a purchase:. We mentioned that quite a few screws are designed to prevent cam outs, while the makers of the slotted screw specifically designed it to cam out to stop the screw from overtightening. When a screw cams out, your screwdriver or bit slips out of the screw head.
When this happens, it can:. Screws that can handle more torque, or force, will typically be less likely to cam out. Screwheads with several grooves, such as the TORX and other star-shaped heads, give your tools more points and grooves to hold onto, lowering the risk of a cam out.
Selecting the right bit for your screw is essential to avoiding cam out. This helpful video can show you how to choose the right bit for your screw head:. However, the wrong size bit can also be to blame.
Remove the screw and start with a new one. Sometimes, this special bit comes in a kit with other tools, all of which work together to grab and pull out the stripped screw. This video demonstrates how to use an extractor to remove a stripped screw, as well as a couple of other handy methods to tuck in your back pocket:. A good rule of thumb is to go for a more simplified design with any project that needs only a light force from a drill or manual use of a screwdriver.
Most screws consist of steel but may also come in variations that are more weather-resistant than regular steel, like stainless steel or titanium. These are good options for putting together outdoor furniture or anything that will be exposed to weather or damp conditions. Aluminum can corrode quickly and is less durable than steel and other heavy-duty materials. Most common screws are relatively low in price. Also, specialty screws, like drywall screws, will typically cost more than screws meant for generic purposes.
The screw head does make a difference, too, in most cases. More common heads, like slotted and Phillips are generally at the low end of the budget, whereas star-shaped, TORX and other high-performing screws may cost more.
Download thousands of custom coloring pages and puzzles for your kids. Do you remember the first time you stripped a screw? Table of Contents I. Screwhead Buying Guide Chart showing 60 types of screws, screw heads, bolts, nuts and washers chart II. Screwhead Shapes III.
Types of Screwheads A. Countersunk Screw Heads B. Non-Countersunk Screw Heads C. Combination Heads D.
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