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.