Thread Profile Dimensions
| Property | mm | Inch |
|---|---|---|
| Nominal Pipe Size (Ø) | 1/16" | ... |
| Pitch (TPI) (P) | 28 | ... |
| Pitch (Distance) (P) | 0.907 | 0.0357 |
| Thread V half Angle (α) | 27.5° | 27.5° |
| Height of sharp V (H) | 0.871 | 0.0343 |
| Thread height (h) | 0.581 | 0.0229 |
| Root/Crest Radius (r) | 0.125 | 0.0049 |
| Major Diameter (D) | 7.723 | 0.3041 |
| Pitch Diameter (D2) | 7.142 | 0.2812 |
| Minor Diameter (D1) | 6.561 | 0.2583 |
| Tap Drill Size (Td) | 6.6 | 0.2598 |
| Tolerance onD1, D2 & D3 | ±0.071 | ±0.0028 |
| BSPT Series | Internal Parallel (Rp) |
| Matching external Thread | BSPT R 1/16 |
| Relevant Standards | ISO 7-1, ISO 7-2 |
