How to choose wood screw

How to choose wood screw in 2019:Step By Step Guideline

Screw is a very important material used in our daily life. They are used in heavy works such as to hang doors, windows etc. They have many characteristics like they have better quality to join the materials such as joining the board. They can grip properly on the board. Wood screws are easily removable and to control.

There are a variety of wood screw with attractive heads and well finishing. To choose the proper wood screw, one has to consider many factors. Some important factors are their size, length, and the diameter. Here we have given some guideline how to choose wood screw.

There are major two types of the wood screw to fasten wood. They are utility wood screw which is also called deck wood screw and stainless screw.
Utility screws are very popular. They are used to frame and in outdoor and window carpentry. They have a range of instruments like resistant metals. They can work better with the chemical wood.

Stainless and steel screws have been used accurately in wood-working furniture such as indoor. These stainless wood screws have a very thin body and they are recognized by their length and their thickness.

There are some common sizes of the wood screw that are used frequently. By this following chart you can understand these types of wood screw:

Size Of wood Screws







Head Bore wood screw

15/64 (diameter of the head of the screw)





Shank hole wood screw

7/64 (diameter of the soft portion of screw through the threads)





Hardwood screw






Softwood screw






Common available size length



3/8-1 1/2

3/8-1 1/2


wood screw

Things to consider choosing wood screw

To select the perfect wood screw, you have to choose one which is enough lengthy and very strong to protect the boards properly with no splitting wood or wasting the wood.

​The wood screw can be long or thin. The diameter of the screw, the thickness of the wood screw is measured in gauge number. Larger the gauge number, thinner the diameter.
The gauge number begins from zero and measure screw about .060 diameters. Every gauge number will successively increase the amount by 0.013.

There are different sizes of wood screw. You can choose according to your need. The wood screw can be flat, oval, and rectangular, round shapes.

Screw head with flat shape is frequently used. Screw head with round shape is popular as it doesn’t need to conceal. The oval-shaped screw has the advantage of round and flat shaped head screws.

If you need strong and weather sustainable screw, you should select galvanized screw.

•Length of the screw:
The length of the wood screw should be enough that can hold two boards tightly and securely. If you use screws which are very short, they cannot properly hold the separated boards tightly. 

And if the screws are very much longer, they can pierce into the other part of the board. So, the screw length should be medium.

•The Thickness of the wood screw:
The thickness of the wood screw should be enough that can grab the two separated boards. By using a very thin screw, it can pull out from the wood.
But if you use a very thick wood screw, it can crack the wood and make the wood useless.

•Pilot holes:
Working with the hardwoods, to drill a pilot hole with a normal bit or counter-sink is actually a very good idea.

Softwoods are better than hardwoods not drilling with a pilot hole because the wood screw is powerful over wood fiber.

The softwoods split less than hardwoods. In softwood screw, you should drill pilot which is 1/64 inches small.

The wood screw achieves power by loads of wood fiber and the friction of the woods. By cutting the fibers and removing them, pilot holes can minimize the grip by decreasing the grabbing power of that screw.

•Lateral force:
The quality of the wood screw depends on the forces that can be lateral or withdrawal which is applied to the boards.

If the wood screw is on lateral force like pushing against something, so it is better to use a thin screw. This force is also called sheer force.

In that case, you should choose a thicker screw. This force attaches the two separated boards to flat one another in a good motion. For example, lateral pressure is used in kitchen cabinets.

•Withdrawal force:
If misapplied force which pulls out the board separately, this load is known as withdrawal force.

If the screw is on withdrawal pressure like pulling down separately, then you can consider that the wood screw is long enough to stand still with the forces.

So, in that case, one or one and half inches of the wood screw should be chosen. It’s obvious that you should avoid in poking the board of the other side. In that case, you should use a short wood screw.

•Grain orientation:
The length and number of the wood screw which are used depend upon Grain orientation. If you want to attach two boards through the grain needs a short wood screw. It should be minimum two inches wood screw on the board.

Generally,one can use deck screw about the diameter of 8 inches. You can use one-one fourth-inch wood screw for fundamental tasks. 

                                               Final Verdict
That was all about how to choose wood screw. By considering these factors above, you can certainly choose and purchase your perfect wood screw. Hope this information can be very helpful in choosing your wood screw and can be useful for your wood-working projects.

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