Pilot Hole Size
Pilot holes are needed to securely and without damage attach wood to another surface. It is important to use the right size hole depending on the screw size. This chart is for tapered screws only, not drywall screws. Note that the pilot hole will vary between a hard and soft wood.
|
American Wood Screw Pilot Hole Sizes |
||||
|
Screw |
Body Dia. |
Shank |
Pilot Hole |
Pilot Hole |
|
0 |
0.060 |
1/16 |
1/64 |
1/32 |
|
1 |
0.073 |
5/64 |
1/32 |
1/32 |
|
2 |
0.086 |
3/32 |
1/32 |
3/64 |
|
3 |
0.099 |
7/64 |
3/64 |
1/16 |
|
4 |
0.112 |
7/64 |
3/64 |
1/16 |
|
5 |
0.125 |
1/8 |
1/16 |
5/64 |
|
6 |
0.138 |
9/64 |
1/16 |
5/64 |
|
7 |
0.151 |
5/32 |
1/16 |
3/32 |
|
8 |
0.164 |
11/64 |
5/64 |
3/32 |
|
9 |
0.177 |
3/16 |
5/64 |
7/64 |
|
10 |
0.190 |
3/16 |
3/32 |
7/64 |
|
11 |
0.203 |
13/64 |
3/32 |
1/8 |
|
12 |
0.216 |
7/32 |
7/64 |
1/8 |
|
14 |
0.242 |
1/4 |
7/64 |
9/64 |
|
16 |
0.268 |
17/64 |
9/64 |
5/32 |
|
18 |
0.294 |
19/64 |
9/64 |
3/16 |
|
20 |
0.320 |
21/64 |
11/64 |
13/64 |
|
24 |
0.372 |
3/8 |
3/16 |
7/32 |
*All sizes in inches