Bolt and Stud Bolt Dimensions for ANSI / ASME B16.5 Class 300 Flanges
Bolt & Stud Bolt Diameter and Length for ANSI / ASME B16.5 Class 300 Flanges
| Nominal Pipe Size, NPS | Diameter of Bolts, in. | Length of Bolts, L | ||
|---|---|---|---|---|
| Stud Bolts | Machine Bolts | |||
| 2mm Raised Face | Ring Joint | 2mm Raised Face | ||
| 1/2 | 1/2 | 65 | 75 | 55 |
| 3/4 | 5/8 | 75 | 90 | 65 |
| 1 | 5/8 | 75 | 90 | 65 |
| 1 1/4 | 5/8 | 85 | 95 | 70 |
| 1 1/2 | 3/4 | 90 | 100 | 75 |
| 2 | 5/8 | 90 | 100 | 75 |
| 2 1/2 | 3/4 | 100 | 115 | 85 |
| 3 | 3/4 | 110 | 120 | 90 |
| 3 1/2 | 3/4 | 110 | 125 | 95 |
| 4 | 3/4 | 115 | 125 | 95 |
| 5 | 3/4 | 120 | 135 | 110 |
| 6 | 3/4 | 120 | 140 | 110 |
| 8 | 7/8 | 140 | 150 | 120 |
| 10 | 1 | 160 | 170 | 140 |
| 12 | 1 1/8 | 170 | 185 | 145 |
| 14 | 1 1/8 | 180 | 190 | 160 |
| 16 | 1 1/4 | 190 | 205 | 165 |
| 18 | 1 1/4 | 195 | 210 | 170 |
| 20 | 1 1/4 | 205 | 220 | 185 |
| 24 | 1 1/2 | 230 | 255 | 205 |
- Dimension of Table 7 are in Millimeters, except for diameters of bolts and bolts holes, which are in inch units.
- 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.