Bolting Dimensions for API Flanges
5000 lb. W.P.
| Nominal Size Inches | Gasket API Number | Number Of Studs | Stud Bolt Size Inches |
|---|---|---|---|
| 2-1/16 | R24 | 8 | 7/8 X 6 |
| 2-9/16 | R27 | 8 | 1 X 6-1/2 |
| 3-1/8 | R35 | 8 | 1-1/8 X 7-1/4 |
| 4-1/16 | R39 | 8 | 1-1/4 X 8 |
| 5-1/8 | R44 | 8 | 1-1/2 X 10 |
| 7-1/16 | R46 | 12 | 1-3/8 X 10-3/4 |
| 9 | R50 | 12 | 1-5/8 X 12 |
| 11 | R54 | 12 | 1-7/8 X 13-3/4 |
| 13-5/8 | BX160 | 16 | 1-5/8 X 12-1/2 |
| 16-3/4 | BX162 | 16 | 1-7/8 X 14-1/2 |
| 18-3/4 | BX163 | 20 | 2 X 17-1/2 |
| 21-1/4 | BX165 | 24 | 2 X 18-3/4 |
