British Std Brass
| Size |
Outside Dia Inch |
Tpi |
Pitch Inch |
Core Dia Inch |
Radius Inch |
Thread Depth Thou |
Tapping Drill Size Inch |
Tapping Drill Size Mm |
Letter Or Number |
|
1/8
|
0.125
|
26
|
0.038
|
0.076
|
0.005
|
25
|
0.079
|
2.0
|
47
|
|
1/4
|
0.250
|
26
|
0.038
|
0.201
|
0.005
|
25
|
0.204
|
5.2
|
6
|
|
3/8
|
0.375
|
26
|
0.038
|
0.326
|
0.005
|
25
|
0.332
|
8.5
|
Q
|
|
1/2
|
0.500
|
26
|
0.038
|
0.451
|
0.005
|
25
|
0.453
|
11.5
|
29/64
|
|
5/8
|
0.625
|
26
|
0.038
|
0.566
|
0.005
|
25
|
0.578
|
14.7
|
37/64
|
|
3/4
|
0.750
|
26
|
0.038
|
0.701
|
0.005
|
25
|
0.703
|
17.9
|
45/64
|
|
7/8
|
0.875
|
26
|
0.038
|
0.826
|
0.005
|
25
|
0.828
|
21.0
|
53/64
|
|
1
|
1.000
|
26
|
0.038
|
0.951
|
0.005
|
25
|
0.953
|
24.2
|
61/64
|
|
1 - 1/8
|
1.125
|
26
|
0.038
|
1.076
|
0.005
|
25
|
1.078
|
27.4
|
1 - 5/64
|
|
1 - 1/4
|
1.250
|
26
|
0.038
|
1.201
|
0.005
|
25
|
1.203
|
30.6
|
1 - 13/64
|
|
1 - 1/2
|
1.500
|
26
|
0.038
|
1.451
|
0.005
|
25
|
1.453
|
36.8
|
1 - 29/64
|