Parallel Pipe Thread (BSPP G)
Parallel Pipe Thread (G) Profile
- Thread form angle : 55°
- P : Pitch
- n : TPI
- H : Height of fundamental triangle
- h : Height of thread
- r : Radius at the top and bottom of the thread
- D : Major diameter of internal thread
- D1 : Minor diameter of internal thread
- D2 : Pitch diameter of internal thread
- d : Major diameter of external thread
- d1 : Minor diameter of external thread
- d2 : Pitch diameter of external thread
Parallel Pipe Thread (G) Tolerance
- T : Tolerance
- TD1, TD2 : Tolerance for D1, D2
- Td1, Td2 : Tolerance for d1, d2
- ES : Upper deviation of internal thread
- es : Upper deviation of external thread
- EI : Lower deviation of internal thread
- ei : Lower deviation of external thread
- Class A, Class B : tolerance class for external thread
- Class A : tolerance class for internal thread
Parallel Pipe Thread (G) Dimension
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Number of threads per inch (TPI) :
n =
0.000
mm
Pitch :
P =
0.000
mm
Height of fundamental triangle :
H =
0.000
mm
Height of thread :
h =
0.000
mm
Radius at the top and bottom of the threads :
r =
0.000
mm
Major diameter (mm)
0.000
0.000
0.000
=
invalid size
Minor diameter (mm)
0.000
0.000
0.000
=
invalid size
Pitch diameter (mm)
0.000
0.000
0.000
=
invalid size
For not specified tolerance, we use the pitch tolerance to calculate the average value.
Standard Parallel Pipe Thread (G)
| Size | TPI |
|---|---|
| G 1/16 | 28 |
| G 1/8 | 28 |
| G 1/4 | 19 |
| G 3/8 | 19 |
| G 1/2 | 14 |
| G 5/8 | 14 |
| G 3/4 | 14 |
| G 7/8 | 14 |
| G 1 | 11 |
| G 1 1/8 | 11 |
| G 1 1/4 | 11 |
| G 1 1/2 | 11 |
| G 1 3/4 | 11 |
| G 2 | 11 |
| G 2 1/4 | 11 |
| G 2 1/2 | 11 |
| G 2 3/4 | 11 |
| G 3 | 11 |
| G 3 1/2 | 11 |
| G 4 | 11 |
| G 4 1/2 | 11 |
| G 5 | 11 |
| G 5 1/2 | 11 |
| G 6 | 11 |
Related topic
How to create a parallel thread profile with CAD software
How to create a 3D model of parallel thread in 3D CAD software