 |
| D - Outside Diameter of Plain End | W - Wall Thickness of Plain End |
| Di - Inside Diameter of Plain End | Wf - Wall Thickness Under Fin |
| dr - Root Diameter | Fh - Height of Fin |
| do - Diameter Over Fins | Fm - Mean Fin Thickness |
| di - Inside Diameter of Fin Section |
|
DEFINITION OF HPT PART NUMBER Example: 365028 |
| 36: fins per inch 5: root diameter (reference) in eights of a n inch |