| |
NPT (API)
(American National Pipe Taper)
|
|
| |
SIZE
|
THREADS
per INCH
|
TAP
DRILL
|
WITH reamer
(mm)
|
WITHOUT
reamer (mm)
|
1/16"
|
27
|
6.10
|
6.30
|
1/8"
|
27
|
8.40
|
8.70
|
1/4"
|
18
|
10.70
|
11.10
|
3/8"
|
18
|
14.25
|
14.50
|
1/2"
|
14
|
17.50
|
18.00
|
3/4"
|
14
|
22.75
|
23.25
|
1"
|
11.5
|
28.50
|
29.00
|
1.1/4"
|
11.5
|
37.50
|
38.00
|
1.1/2"
|
11.5
|
43.50
|
44.00
|
2"
|
11.5
|
55.00
|
56.00
|
|
|
|
|
|
|
|
