Related Resources: hardware
Pilot Holes Asbestos Fiberglass Compositions with Self Tapping Screws
ANSI Hardware Design and Application Guide
ISO Metric Hardware Engineering and Design Data
Fastener and Screw / Bolt Design, Formula & Calculations
Approximate Pilot Holes In Asbestos or Fiberglass Compositions for Type A Steel Sheet Metal Thread Forming Screws
Pilot Holes In Asbestos or Fiberglass Compositions
|
In Fiberglass or Asbestos Compositions
|
||||||||
|
Screw
Size |
Hole
Size |
Drill
Size |
Min. Mat'l
Thickness |
Penetration in
Blind Holes |
||||
|
Min.
|
Max.
|
|||||||
|
4
|
0.094
|
42
|
0.188
|
0.250
|
0.750
|
|||
|
6
|
0.106
|
36
|
0.188
|
0.250
|
0.750
|
|||
|
7
|
0.125
|
1⁄8
|
0.250
|
0.312
|
0.750
|
|||
|
8
|
0.136
|
29
|
0.250
|
0.312
|
0.750
|
|||
|
10
|
0.161
|
20
|
0.312
|
0.375
|
1.000
|
|||
|
12
|
0.185
|
13
|
0.312
|
0.375
|
1.000
|
|||
|
14
|
0.213
|
3
|
0.438
|
0.500
|
1.000
|
|||
Type A is not recommended, use Type AB. See footnote at bottom of
Related
- Pilot Hole Sizes In Plywood (Resin Impregnated) for Type A Steel Sheet Metal Thread Forming Screws
- Pilot Hole Sizes for Steel Sheet Metal Crews in Sheet Metal
- Sheet Metal Self Threading ANSI Screws Dimensions for B and BP Threads
- Sheet Metal Thread Dimensions for Types AB, A and U Thread Forming Tapping Screws
- Maximum tightening torque for metric self tapping screws
- Self Tapping Screw Pull-Out and Torque Calculator
- Self Tapping Screw Pull-Out and Torque Calculator
- Self Tapping Screws Installation Design & Engineering
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