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 |
| Pitch Diameter (At gauge plane) (D2) |
14.95 | 0.5886 |
| Minor Diameter (At gauge plane) (D1) |
15.806 | 0.6223 |
| BSPT Series | Internal Tapared (Rc) |
| Matching external Thread | BSPT R 3/8 |
| Relevant Standards | ISO 7-1, ISO 7-2 |
BSPT Rc 3/8 - Additional Dimensions
| mm | ||
|---|---|---|
| Gauge Length (Lg) | 6.4 | 0.252 |
| Lg Tolerance (T2) | 1.25 Turns | 1.25 Turns |
| Lg Tolerance (T2) | 1.7 | 0.0669 |
| Minimum length of useful threads (Lmin) |
7 | 0.2756 |
| Tap Drill Size (Td) | 14.75 | 0.5807 |
