TAPPING SCREWS (SHEET METAL SCREWS)
|
|
Suggested Hole Sizes for Types A, AB, and B Tapping Screws
Nominal
Screw Size |
Hole Diameter
|
Closest Drill Size to Mean Hole Diameter |
|||
Max |
Mean |
Min |
Drill size |
Drill Dia |
|
0 - 48 |
0.049 |
0.046 |
0.043 |
56 |
0.0465 |
1 - 42 |
0.063 |
0.059 |
0.055 |
53 |
0.0595 |
2 - 32 |
0.077 |
0.072 |
0.067 |
49 |
0.073 |
3 - 28 |
0.090 |
0.084 |
0.078 |
45 |
0.082 |
4 - 24 |
0.103 |
0.096 |
0.089 |
41 |
0.096 |
5 - 20 |
0.114 |
0.107 |
0.100 |
36 |
0.1065 |
6 - 20 |
0.124 |
0.116 |
0.108 |
32 |
0.116 |
7 - 19 |
0.138 |
0.129 |
0.120 |
30 |
0.1285 |
8 - 18 |
0.148 |
0.138 |
0.128 |
29 |
0.136 |
10 - 16 |
0.170 |
0.159 |
0.148 |
21 |
0.159 |
12 - 14 |
0.194 |
0.182 |
0.169 |
14 |
0.182 |
1/4 - 14 |
0.226 |
0.211 |
0.196 |
4 |
0.209 |
5/16 - 12 |
0.289 |
0.270 |
0.251 |
I |
0.272 |
3/8 - 12 |
0.356 |
0.333 |
0.310 |
Q |
0.332 |
7/16 - 10 |
0.413 |
0.386 |
0.359 |
W |
0.386 |
1/2 - 10 |
0.480 |
0.449 |
0.418 |
29/64 |
0.4531 |
Online
Store | Services | My
Account |
About Fasteners | About
Us | Help
Customer
Service | Site Map | Contact
Us |
Shopping Cart
© 2010 InStock Fasteners