Charts & Specs
Bolting Data 900
| Bolting Data for ASME B16.5 & BS 1560 Flanges | ||||
| Nominal Pipe Size |
Class 900 | |||
| Flange Dia. | No. of Bolts | Bolt Diameter | B.C. Diameter | |
| 1/2 | 4-3/4 | 4 | 3/4 | 3-1/4 |
| 3/4 | 5-1/8 | 4 | 3/4 | 3-1/2 |
| 1 | 5-7/8 | 4 | 7/8 | 4 |
| 1-1/4 | 6-1/4 | 4 | 7/8 | 4-3/8 |
| 1-1/2 | 7 | 4 | 1 | 4-7/8 |
| 2 | 8-1/2 | 8 | 7/8 | 6-1/2 |
| 2-1/2 | 9-5/8 | 8 | 1 | 7-1/2 |
| 3 | 9-1/2 | 8 | 7/8 | 7-1/2 |
| 4 | 11-1/2 | 8 | 1-1/8 | 9-1/4 |
| 5 | 13-3/4 | 8 | 1-1/4 | 11 |
| 6 | 15 | 12 | 1-1/8 | 12-1/2 |
| 8 | 18-1/2 | 12 | 1-3/8 | 15-1/2 |
| 10 | 21-1/2 | 16 | 1-3/8 | 18-1/2 |
| 12 | 24 | 20 | 1-3/8 | 21 |
| 14 | 25-1/4 | 20 | 1-1/2 | 22 |
| 16 | 27-3/4 | 20 | 1-5/8 | 24-1/4 |
| 18 | 31 | 20 | 1-7/8 | 27 |
| 20 | 33-3/4 | 20 | 2 | 29-1/2 |
| 24 | 41 | 20 | 2-1/2 | 35-1/2 |