Thread Profile Dimensions
| Property | mm | Inch |
|---|---|---|
| Nominal Pipe Size (Ø) | 3/8" | ... |
| Pitch (TPI) (P) | 19 | ... |
| Pitch (Distance) (P) | 1.337 | 0.0526 |
| Thread Tapper Angle (ß) | 1.79° | 1.79° |
| Thread V half Angle (α) | 27.5° | 27.5° |
| Height of sharp V (H) | 1.284 | 0.0506 |
| Thread height (h) | 0.856 | 0.0337 |
| Root/Crest Radius (r) | 0.424 | 0.0167 |
| Major Diameter (At gauge plane) (d) |
16.662 | 0.656 |
| Minor Diameter (At gauge plane) (d1) |
14.95 | 0.5886 |
| Pitch Diameter (At gauge plane) (d2) |
15.806 | 0.6223 |
| BSPT Series | External Tapared (R) |
| Matching Internal Tapered Thread | BSPT Rc 3/8 |
| Matching Internal Parallel Thread | BSPT Rp 3/8 |
| Relevant Standards | ISO 7-1, ISO 7-2 |
BSPT R 3/8 - Additional Dimensions
| mm | ||
|---|---|---|
| Gauge Length (Lg) | 6.4 | 0.252 |
| Lg Tolerance (T1) | 1 Turns | 1 Turns |
| Lg Tolerance (T1) | 1.3 | 0.0512 |
| Fitting allowance (F) | 2.75 Turns | 2.75 Turns |
| Fitting allowance (F) | 3.7 | 0.1457 |
| Minimum length of useful threads (Lmin) |
8.8 | 0.3465 |
