| Material: | Steel |
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| Shape of Head: | Flat |
| Shape of Groove: | Cross |
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samples for free, buyer pay shipping freight
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Audited Supplier A screw is made up of 4 components:
Screws used in woodworking will have a pointed tip to help guide the screw into a precise location. Self-drilling screws have a split point that cuts into the wood like a drill bit. Other screws, such as machine screws have no point.
There are lots and lots of different types of drives, but thankfully, there are just a few common ones you need to know.
Slotted screws are the original method for driving a screw. Like the name implies, it's just a slot that a flathead screwdriver turns. For this reason, these types of screws are commonly called flathead screws way more often than slotted screws.
Flathead screws require a lot of patience to use and are very difficult to drive with a drill or impact driver. It's weird how common they still are, still readily available at hardware stores. Basically they suck and I would never recommend them for woodworking with one exception: if you want to make a period piece of furniture with historic accuracy. Other than that, avoid slotted screws whenever possible.
When Phillips screws came out in the 1930s, they were a vast improvement over slotted screws. A Phillips head driver will stay in place a lot better, but they still have an annoying tendency to cam-out, or slip when driving the last bit into wood. This can ruin the head and also ruins the driver.I have heard that they were designed to do this in order to prevent over tightening, but I'm not sure if that's true.
Square drives are a huge improvement! They are also called Robertson screws and are most common in Canada. They are definitely harder to find in the U.S. Their square shape greatly reduces, almost eliminating cam-out and driver slipping. Here in the U.S. you will mostly find these in pocket screws.
Star drive screws are becoming more and more common in the U.S. and are my absolute favorite type of drive. The star shape virtually eliminates cam-out and the driver almost never slips out. Plus they can accommodate a lot of torque. Usually they are sold on premium quality screws that won't snap if tightened too much. And when you buy a box, it usually comes with the driver tip you need.
Like the drive types, there are all kinds of head shapes. Luckily, there are really only two that common in woodworking.
This is where the terminology can get a little confusing. It's easy to confuse a screw with a flad head, and a slotted screw that we often call flathead screws. For woodworking a flathead screw is the most common kind of screw to use. It has a beveled head that seats neatly into the wood, making it flush with the surface
You can just power the screw into the wood to make it flush, but you will get better and cleaner results if you use a countersink bit to drill a pilot hole, or use a countersink to cut the bevels after you drill a pilot hole.
Panhead or roundheads can have shallow or deep domes. They sit on top of the wood and aren't used much for woodworking. You will need to use these when attaching some other material to wood…something that you can't countersink, say metal or plastic.
Wood screws are widely available in all home centers and hardware stores and are designed to join two pieces of wood together. They are threaded part of the way and then have a smooth shank at the top. This helps hold the screws in place. They are relatively inexpensive and come an all kinds of diameters and head shapes. You will usually want to use the ones with the tapered heads. Unfortunately, in the U.S., most woodscrews are still only available with Phillips heads instead of star or square drives.
Standard wood screw
A lot of woodworkers use drywall screws, mostly for shop projects and jigs. They are inexpensive, usually cheaper than wood screws and easy to find just about anywhere. They have thinner shanks than wood screws, usually about equal to a #6 screw and threads that run the entire length of the screw. Because of their thinness they are really brittle. Especially ff you are drilling into hardwood, they are really prone to snapping, but I've had this frustrating experience with using them for 2x4s too. Like wood screws, in the U.S. the heads are almost always Phillips. Also, the heads have a bugle shape to reduce tearing the paper on drywall. They don't match the beveled shape of a countersink. In general, I don't recommend using drywall screws for woodworking projects.
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. I don't think I've ever had any break. 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.
The best part is that they come in star or square drives so your driver stays in place and won't slip out like with Phillips. 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. And while my Mere Mortals philosophy is always to be frugal, this is one instance where I believe it's worth spending the extra money. The amount of time and frustration these types of screws save is enormous.
If you've never used multi-purpose or Spax screws, just get one box and try them out. I guarantee, you will wonder why you didn't try them sooner!
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. When you buy them, make sure the nuts' threads match. You may occasionally need machine screws to fasten a couple boards together, but they aren't common in woodworking.
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.
And there's a basic look at the various types of screws. 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 don't recommend stocking up on anything other than #8 1-¼" screws. I always like to have these on hand.
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Item
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Hot Sale Counter Sunk Chipboard Screw Pozi Driv Screw Blue Zinc Plated
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Finish
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Blue zinc plated; Black, yellow
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Size
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3.5*16,4*16,4*20,5*100mm...see following details
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Head type
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Pozi
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End type
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Flat end
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Packing
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2500pcs/3000pcs/carton
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Packing: packed into cartons, then wooden pallet
1) Q: Will you deliver the goods as ordered? How can I trust you?
A: Yes, we will. We are a professional manufacturer of coiled nails. Our factory has good qualifications. Our team has more than 15 years of experience in design and manufacturing. We are also a certified member of MIC.
2) Q: How to choose the products?
A: Please tell us the following details.
Length.
Diameter.
Finish: Polished, electro-galvanized/hot-dip galvanized coating
Thread: twisted, flat shank, ring shank
3) Q: What is the nearest airport to your company?
A: Qingdao, Shandong Province
4) Q: What is your service?
A: Before sales.
Technical support: provide detailed technical information, such as technical and commercial quotations, product photos, etc.
5)Samples.
Are samples available?
Samples of standard specifications are usually available; samples are free of charge, but shipping costs are paid by the buyer.
6)How long is your delivery time?
A: Delivery time varies depending on the season and the quantity of your order; usually, we can deliver your goods within 7 days (excluding shipping time).
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