Flat head screws are countersunk into the material for a smooth surface area.
There are different materials of flat head wood screws, such as copper, zinc plated steel,etc.
Size Number | Shank Diameter* |
---|
Decimal | Nearest Fractional Measurement |
---|
0 | .060 | 1/16 |
1 | .073 | 5/64 |
2 | .086 | 3/32 |
3 | .099 | 7/64 |
4 | .112 | 7/64 |
5 | .125 | 1/8 |
6 | .138 | 9/64 |
7 | .151 | 5/32 |
8 | .164 | 5/32 |
9 | .177 | 11/64 |
10 | .190 | 3/16 |
11 | .203 | 13/64 |
12 | .216 | 7/32 |
14 | .242 | 1/4 |
16 | .268 | 17/64 |
18 | .294 | 19/64 |
20 | .320 | 5/16 |
* Shank diameter is measured on the smooth portion of the screw above the threads. For more information about how to measure diameter see our Measuring Fastener Diameter page. |