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Pilot Hole Sizes In Plywood

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Approximate Pilot Hole Sizes In Plywood (Resin Impregnated) for Type A Steel Sheet Metal Thread Forming Screws

In Plywood (Resin Impregnated)
Screw
Size
Hole
Size
Drill
Size
Min. Mat'l
Thickness
Penetration in
Blind holes
Thickness
Min.
Max.
4
0.098
40
0.188
0.250
0.750
6
0.110
35
0.188
0.250
0.750
7
0.128
30
0.250
0.312
0.750
8
0.140
28
0.250
0.312
0.750
10
0.170
18
0.312
0.375
1.000
12
0.189
12
0.312
0.375
1.000
14
0.228
1
0.438
0.500
1.000

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