|
Tap Size |
BSPF DRILL DIAMETER |
BSPT DRILL DIAMETER |
|
1/8 28 |
8.8 MM |
8.4 MM |
|
1/4 19 |
11.8 MM |
11.5 MM |
|
3/8 19 |
15.25 MM |
15.00 MM |
|
1/2 14 |
19.00 MM |
18.50 MM |
|
5/8 14 |
21.00 MM |
|
|
3/4 14 |
24.50 MM |
24.00 MM |
|
1" 11 |
30.75 MM |
30.25 MM |
|
1 1/8 11 |
35.50 MM |
|
|
1 1/4 11 |
39.50 MM |
33.00 MM |
|
1 3/8 11 |
42.00 MM |
|
|
1 1/2 11 |
45.00 MM |
45.00 MM |
|
1 3/4 11 |
51.00 MM |
|
|
2" 11 |
57.00 MM |
56.50 MM |
|
2 1/4 11 |
63.30 MM |
|
|
2 1/2 11 |
72.80 MM |
71.40 MM |
|
2 3/4 11 |
79.10 MM |
|
|
3" 11 |
85.50 MM |
83.00 MM |
|
3 1/2 |
97.90 MM |
3 3/16 |
|
4" |
110.60 MM |
|
|
4 1/2 |
123.30 MM |
|
|
5" |
136.00 MM |
|
|
5 1/2 |
148.70 MM |
|
|
6" |
161.40 MM |
|