Screws intended for construction generally range from 1 inch to 8 inches long
Drywall screw has become the standard fastener for securing full or partial sheets of drywall to wall studs or ceiling joists. Drywall screws’ lengths and gauges, thread types, heads, points, and composition at first might seem incomprehensible. But within the area of do-it-yourself home improvement, this vast range of choices narrows down to just a few well-defined picks that work within the limited types of uses encountered by most homeowners. Even having a good handle on just the three main features of drywall screws will help drywall screw length, gauge, and thread.
Most drywall installed in homes is 1/2-inch thick. Thickness can sometimes increase or decrease, but only by very little and not very often. About the only time that do-it-yourselfers will need to install thicker drywall is with fire code or type-x drywall. At 5/8-inch, type-x drywall is slightly thicker to retard the spread of flames and is used in garages and walls adjacent to furnace rooms.
| Drywall Screw Black / Grey phosphated, Electro Galvanized Fine thread, Coarse thread |  |
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SIZE | D(mm) | DK(mm) | L (mm） |
| (6#) 3.5mm | 7.80-8.00 | 3.35-3.53 | 16-55 | |
| (7#) 3.9mm | 7.80-8.00 | 3.73-3.9 | 16-55 | |
| (8#) 4.2mm | 7.80-8.00 | 4.04-4.22 | 16-102 | |
| (10#) 4.8mm | 8.80-9.40 | 4.62-4.8 | 16-152 | |
Diameter:#6(3.5mm),#7(3.9mm),#8(4.2mm),#10(4.8mm)
Thread:Fine thread,coarse thread
Packing:1000pcs/box,20box/carton,according to request
Weight Varies By Profile
The main purpose for drywall screws is securing full sheets of drywall (usually 4-foot by 8-foot for do-it-yourselfers) or partial sheets of drywall to either wood or metal studs.
Drywall screws are good for repairing nail pops. If you have an older house and find walls that have mysterious circular bumps, then you have what is called nail-pops.
Some do-it-yourselfers use drywall screws for one unintended purpose: building projects. Drywall screws tend to be brittle. Rather than bending, they can snap. Drywall screw heads are especially prone to cleanly breaking off, leaving the shaft section embedded in your wood. No screw extractor can remove a headless screw.
Few woodworkers would ever use drywall screws for fine building. Avoidance of drywall screws is especially important with heavy or even moderate building tasks, critically with outdoor projects like fences and decks. But drywall screws can be used for light building projects or for temporary construction when safety is not a factor.
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