Hex Bolts and Stud Bolt Dimensions for ASME B16.5 Class 300 Flange.
Bolt & Stud Bolt Diameter and Length for 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 |
Notes:
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.