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How do I know what length screw to use?
The most important factor in screw selection is length. The general rule of thumb is that the screw should enter at least half the thickness of the bottom material, e.g. 3/4″ into a 2 x 4. The other factor is the screw’s diameter, or gauge. Screws come in gauges 2 through 16.
How do wood screw sizes work?
A screw for wood is sized by two distinct numbers, first is the gauge of the screw which is the diameter. This means, the larger the number the larger the diameter. Therefore, a number 12 screw is larger than a number 4 screw.
What screws to use on 2×4?
The most common screw for joining two-by-fours is hardened steel, structural, No. 9, 2 1/2 inches long with a Phillips head. Other screw types appropriate for studs are specialized and may be harder to find and more expensive.
What do screw size numbers mean?
The first number is the diameter. The bigger the number the bigger the screw. The second number is the number of threads per inch.
How to choose the best screw length for a deck?
1 For a sheer strength piece, use a ¼-inch lag screw 2 Use #8 diameter utility or deck screw for most tasks 3 Use 1¼-inch screw for basic tasks such as attaching ¾-inch boards across the grain 4 Have on hand some 2½-inch utility screws for using into end grain 5 Use 3-inch screw for 2x boards for into end grain, for a stronger connection
What kind of Screws do you need for a computer case?
A regular computer case may require/include. 9 thumb screw 6-32 × 6 mm for 2.5” drive tray, expansion slots; 18 special thumb screw unknown size for side panel, 3.5” drive tray, psu bracket; 0 hexagon screw 6-32 × 6 mm for psu; 34 phillips screw 6-32 × 5 mm for motherboard, 3.5” harddisk tray; 0 phillips screw M3 × 5 mm for 2.5” harddrive
How big of a screw do you need to attach two boards?
As a general rule, screws needed for attaching two boards across the grain do not need to be as long as when screws are inserted into end grain. When screwing into the end grain, aim for at least two inches of thread in the board.
How big of a desk do you need for 2 ft?
For a 2 ft (0.61 m) x 4 ft (1.2 m) desk, you would simply cut two 8 ft (2.4 m) 2×6 boards in half lengthwise to get four pieces that you can then assemble into a single plane. You’ll be clamping multiple boards together to fashion the desktop, so be sure to shave off any rounded edges on the boards that will go in the middle section.