OTHER PRESSURE CLASSES
NPS | DIA bolts (in) |
Length RF |
Length RTJ |
Number of bolts |
1/2 | 3/4 | 110 | 110 | 4 |
3/4 | 3/4 | 115 | 115 | 4 |
1 | 7/8 | 125 | 125 | 4 |
1.1/4 | 7/8 | 125 | 125 | 4 |
1.1/2 | 1 | 140 | 140 | 4 |
2 | 7/8 | 145 | 145 | 8 |
2.1/2 | 1 | 160 | 160 | 8 |
3 | 1.1/8 | 180 | 180 | 8 |
4 | 1.1/4 | 195 | 195 | 8 |
5 | 1.1/2 | 250 | 250 | 8 |
6 | 1.3/8 | 260 | 265 | 12 |
8 | 1.5/8 | 290 | 300 | 12 |
10 | 1.7/8 | 335 | 345 | 12 |
12 | 2 | 375 | 385 | 16 |
14 | 2.1/4 | 405 | 425 | 16 |
16 | 2.1/2 | 445 | 470 | 16 |
18 | 2.3/4 | 495 | 525 | 16 |
20 | 3 | 540 | 565 | 16 |
24 | 3.1/2 | 615 | 650 | 16 |
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