Thread Profile Dimensions
| Property | mm | Inch |
|---|---|---|
| Nominal Pipe Size (Ø) | 3" | ... |
| Pitch (TPI) (P) | 11 | ... |
| Pitch (Distance) (P) | 2.309 | 0.0909 |
| Thread Tapper Angle (ß) | 1.79° | 1.79° |
| Thread V half Angle (α) | 27.5° | 27.5° |
| Height of sharp V (H) | 2.217 | 0.0873 |
| Thread height (h) | 1.479 | 0.0582 |
| Root/Crest Radius (r) | 0.733 | 0.0289 |
| Major Diameter (At gauge plane) (d) |
87.884 | 3.46 |
| Minor Diameter (At gauge plane) (d1) |
84.927 | 3.3436 |
| Pitch Diameter (At gauge plane) (d2) |
86.405 | 3.4018 |
| BSPT Series | External Tapared (R) |
| Matching Internal Tapered Thread | BSPT Rc 3 |
| Matching Internal Parallel Thread | BSPT Rp 3 |
| Relevant Standards | ISO 7-1, ISO 7-2 |
BSPT R 3 - Additional Dimensions
| mm | ||
|---|---|---|
| Gauge Length (Lg) | 20.6 | 0.811 |
| Lg Tolerance (T1) | 1.5 Turns | 1.5 Turns |
| Lg Tolerance (T1) | 3.5 | 0.1378 |
| Fitting allowance (F) | 4.00 Turns | 4 Turns |
| Fitting allowance (F) | 9.2 | 0.3622 |
| Minimum length of useful threads (Lmin) |
26.3 | 1.0354 |
