Bolt and Stud Bolt Dimensions for ANSI / ASME B16.5 Class 400 Flanges
Bolt & Stud Bolt Diameter and Length for ANSI / ASME B16.5 Class 400 Flanges
| Nominal Pipe Size, NPS | Diameter of Bolts, in. | Length of Bolts, L | ||
|---|---|---|---|---|
| Raised Face 0.25 in. | Male and Female/ Tongue and Groove | Ring Joint | ||
| 1/2 | 1/2 | 3.00 | 2.75 | 3.00 |
| 3/4 | 5/8 | 3.50 | 3.25 | 3.50 |
| 1 | 5/8 | 3.50 | 3.25 | 3.50 |
| 1 1/4 | 5/8 | 3.75 | 3.50 | 3.75 |
| 1 1/2 | 3/4 | 4.25 | 4.00 | 4.25 |
| 2 | 5/8 | 4.25 | 4.00 | 4.25 |
| 2 1/2 | 3/4 | 4.75 | 4.50 | 4.75 |
| 3 | 3/4 | 5.00 | 4.75 | 5.00 |
| 3 1/2 | 7/8 | 5.50 | 5.25 | 5.50 |
| 4 | 7/8 | 5.50 | 5.25 | 5.50 |
| 5 | 7/8 | 5.75 | 5.25 | 5.75 |
| 6 | 7/8 | 6.00 | 5.75 | 6.00 |
| 8 | 1 | 6.75 | 6.50 | 6.75 |
| 10 | 1 1/8 | 7.50 | 7.25 | 7.50 |
| 12 | 1 1/4 | 8.00 | 7.75 | 8.00 |
| 14 | 1 1/4 | 8.25 | 8.00 | 8.25 |
| 16 | 1 3/8 | 8.75 | 8.50 | 8.75 |
| 18 | 1 3/8 | 9.00 | 8.75 | 9.00 |
| 20 | 1 1/2 | 9.50 | 9.25 | 9.75 |
| 24 | 1 3/4 | 10.50 | 10.25 | 11.00 |
- Dimension are in inches.
- Length of stud bolts does not include the height of the points.
- Bolt lengths not shown in table may be determined in accordance with Annex D.