Thread Profile Dimensions
| Property | mm | Inch |
|---|---|---|
| Nominal Pipe Size (Ø) | 1/2" | ... |
| Pitch (TPI) (P) | 14 | ... |
| Pitch (Distance) (P) | 1.814 | 0.0714 |
| Thread Tapper Angle (ß) | 1.79° | 1.79° |
| Thread V half Angle (α) | 27.5° | 27.5° |
| Height of sharp V (H) | 1.742 | 0.0686 |
| Thread height (h) | 1.162 | 0.0457 |
| Root/Crest Radius (r) | 0.576 | 0.0227 |
| Major Diameter (At gauge plane) (d) |
20.955 | 0.825 |
| Minor Diameter (At gauge plane) (d1) |
18.632 | 0.7335 |
| Pitch Diameter (At gauge plane) (d2) |
19.793 | 0.7793 |
| BSPT Series | External Tapared (R) |
| Matching Internal Tapered Thread | BSPT Rc 1/2 |
| Matching Internal Parallel Thread | BSPT Rp 1/2 |
| Relevant Standards | ISO 7-1, ISO 7-2 |
BSPT R 1/2 - Additional Dimensions
| mm | ||
|---|---|---|
| Gauge Length (Lg) | 8.2 | 0.3228 |
| Lg Tolerance (T1) | 1 Turns | 1 Turns |
| Lg Tolerance (T1) | 1.8 | 0.0709 |
| Fitting allowance (F) | 2.75 Turns | 2.75 Turns |
| Fitting allowance (F) | 5 | 0.1969 |
| Minimum length of useful threads (Lmin) |
11.4 | 0.4488 |
