OTHER PRESSURE CLASSES
NPS | DIA (in) bolts |
Length (in) RF |
Length (in) RTJ |
Number of bolts |
1/2 | 1/2 | 3 | 3 | 4 |
3/4 | 5/8 | 3.1/2 | 3.1/2 | 4 |
1 | 5/8 | 3.1/2 | 3.1/2 | 4 |
1.1/4 | 5/8 | 3.3/4 | 3.3/4 | 4 |
1.1/2 | 3/4 | 4.1/4 | 4.1/4 | 4 |
2 | 5/8 | 4.1/4 | 4.1/4 | 8 |
2.1/2 | 3/4 | 4.3/4 | 4.3/4 | 8 |
3 | 3/4 | 5 | 5 | 8 |
3.1/2 | 7/8 | 5.1/2 | 5.1/2 | 8 |
4 | 7/8 | 5.3/4 | 5.3/4 | 8 |
5 | 1 | 6.1/2 | 6.1/2 | 8 |
6 | 1 | 6.3/4 | 6.3/4 | 12 |
8 | 1.1/8 | 7.1/2 | 7.3/4 | 12 |
10 | 1.1/4 | 8.1/2 | 8.1/2 | 16 |
12 | 1.1/4 | 8.3/4 | 8.3/4 | 20 |
14 | 1.3/8 | 9.1/4 | 9.1/4 | 20 |
16 | 1.1/2 | 10 | 10 | 20 |
18 | 1.5/8 | 10.3/4 | 10.3/4 | 20 |
20 | 1.5/8 | 11.1/4 | 11.1/2 | 24 |
22 | 1.3/4 | 12 | 12.1/4 | 24 |
24 | 1.7/8 | 13 | 13.1/4 | 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