
The size of a screw is described by its diameter, the number of threads per inch, and its length in inches. The larger the number, the larger the screw. For example, a #8 screw is larger than a #4 screw. Machine screws, including cap screws and bolts, can range from 1/4 inch to 3 inches or more. The next size up from a #14 screw would be a #16 screw.
Characteristics of the Next Size Up From a #14 Screw
Characteristics | Values |
---|---|
Diameter | #16 |
Number of Threads Per Inch | 14 |
Length | Varies, commonly up to 24 inches |
What You'll Learn
#16 screw
Lengths
Materials
Steel
Steel #16 screws are available in plain or black oxide finishes. They are suitable for use in wood and are often referred to as wood screws.
Zinc
Zinc-plated #16 screws are available with a Phillips flat head and are suitable for use in wood.
Stainless Steel
Stainless steel #16 screws are available as part of a kit with other screw sizes and are suitable for use in wood.
Nylon
Nylon-head #16 screws are available in a choice of finishes and are self-drilling. They are designed for harsh environments, especially coastal regions, and are rust-resistant.
Other Specifications
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#18 screw
The size of a screw in the "inch" series is described by its diameter, the number of threads per inch, and its length in inches. The diameter of screws like the #18 screw is given as a one or two-digit number, with the larger the number, the larger the size. Therefore, a #18 screw is larger than a #14 screw.
The #18 screw has a flat head that is countersunk, meaning it is cone-shaped under the head with a flat top. The slotted drive has a simple slot that uses a flat-bladed screwdriver.
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#20 screw
The length of a #20 screw is measured from the top of its flat head to the tip of the screw. It's important to note that while the thread diameter remains uniform, the shank diameter can vary between cut thread and rolled thread manufacturing processes.
When selecting the appropriate screw length for your project, it's crucial to consider the thickness of the material you're fastening. For example, a longer screw is typically required for attaching a deck ledger to a rim joist than for fastening two thinner pieces of wood.
- 3/4"
- 1"
- 1-1/4"
- 1-1/2"
- 2"
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#24 screw
The #24 screw is a standard size of screw, with a diameter of 3/8 inches. This is larger than a #14 screw, which has a diameter of 0.142 inches. The #24 screw is a common size for wood screws, with a Phillips flat head. These screws are typically used for fastening wood to wood or wood to metal. They feature a self-tapping design, with a sharp thread that cuts into the material, and a Phillips drive for installation with a cross-head screwdriver.
The #24 screw is also available in machine screw form, with a Phillips pan head or a round head with a slotted/Phillips combo drive. These machine screws are typically made from stainless steel or zinc-plated steel and are available in a range of lengths from 1/2 inch to 2 inches. They are used for fastening metal to metal and can be purchased with a variety of assortments, including nuts and washers.
When selecting a #24 screw, it is important to consider the length and type of head that is required for the specific application. The length of the screw will depend on the thickness of the material being fastened and the desired depth of the screw. The head type should be chosen based on the tools available for installation and the desired appearance of the finished product.
The #24 screw is a versatile and commonly used size that can be found at most hardware stores and online retailers. It is important to refer to the specific measurements and features of the screw when purchasing to ensure it is suitable for the intended purpose.
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1/4-inch bolts
#14 screws are typically used with nuts or in threaded holes, and their size is described by their diameter, the number of threads per inch, and their length in inches. The next size up from a #14 screw would be a #16 screw, followed by #18, #20, and so on.
Now, let's focus on 1/4-inch bolts, which are larger than #14 screws. These bolts are commonly found in various lengths, including:
- 1/2 inch
- 1 inch
- 2 inches
- 2-1/2 inches
- 3 inches
- 4 inches
- 5 inches
- 6 inches
- 8 inches
The length of a hex bolt is measured from under its head to the end of the bolt. These bolts are typically made of stainless steel or zinc-plated materials and are available in various pack sizes.
- 1/4-20 x 1-inch zinc-plated hex bolt
- 1/4-inch x 2-inch stainless steel eye bolt with nut
- 1/4-20 x 2-1/2-inch zinc-plated carriage bolt
- 1/4-20 x 3/4-inch hex head screw bolt, fully threaded, made of stainless steel
- 1/4-20 x 1-inch button head socket cap bolt, made of stainless steel
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Frequently asked questions
The next size up would be #16. The larger the number, the larger the screw.
The diameter is specified by a one or two-digit number.
The length of a screw is measured in inches. Lengths commonly range from 1/16 inch to 24 inches.
The thread size is the number of threads per inch. Common thread sizes include 4, 4-1/2, 5, 5-1/2, and so on.
Inch series fasteners, including #14 screws, are most commonly used in the USA and Canada.