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11 Different Types Of Taps To Select | Complete Guide
Hand Tapping | How To Guide
| BSW British Standard Whitworth |
Nominal
dia. |
Threads
per
inch |
Tap
drill sizes
mm. |
1/16
3/32
1/8
5/32
3/16
7/32
1/4
5/16
3/8
7/16
1/2 |
60
48
40
32
24
24
20
18
16
14
12 |
1.20
1.90
2.55
3.20
3.70
4.50
5.10
6.50
7.90
9.30
10.50
|
9/16
5/8
11/16
3/4
7/8
1 |
12
11
11
10
9
8 |
12.10
13.50
15.00
16.25
19.25
22.00 |
1.1/8
1.1/4
1.1/2
1.3/4
2
|
7
7
6
5
4.5 |
24.75
28.00
33.50
39.00
44.50 |
