OTHER PRESSURE CLASSES
NPS | DIA bolts (in) |
Length RF |
Length RTJ |
Number of bolts |
1/2 | 1/2 | 75 | 75 | 4 |
3/4 | 5/8 | 90 | 90 | 4 |
1 | 5/8 | 90 | 90 | 4 |
1.1/4 | 5/8 | 95 | 95 | 4 |
1.1/2 | 3/4 | 110 | 110 | 4 |
2 | 5/8 | 110 | 110 | 8 |
2.1/2 | 3/4 | 120 | 120 | 8 |
3 | 3/4 | 125 | 125 | 8 |
3.1/2 | 7/8 | 140 | 140 | 8 |
4 | 7/8 | 145 | 145 | 8 |
5 | 1 | 165 | 165 | 8 |
6 | 1 | 170 | 170 | 12 |
8 | 1.1/8 | 190 | 195 | 12 |
10 | 1.1/4 | 215 | 215 | 16 |
12 | 1.1/4 | 220 | 220 | 20 |
14 | 1.3/8 | 235 | 235 | 20 |
16 | 1.1/2 | 255 | 255 | 20 |
18 | 1.5/8 | 275 | 275 | 20 |
20 | 1.5/8 | 285 | 290 | 24 |
24 | 1.7/8 | 330 | 335 | 24 |
General notes..
Studs are measured parallel to the axis (L) from the first to the thread without the chamfers (points). S = free threads equals 1/3 time bolt dia
Hex bolts are measured from under the head to the top of de bolt