ASME B16.5 — Class 2500 stud bolts
ASME B16.5 Class 2500 stud bolts — 14 sizes.
| NPS | No. of studs | Stud dia — in (in) | Length — Raised face, mm (mm) | Length — Ring joint, mm (mm) |
|---|---|---|---|---|
| ½" | 4 | ¾" | 120 | 120 |
| ¾" | 4 | ¾" | 125 | 125 |
| 1" | 4 | ⅞" | 140 | 140 |
| 1¼" | 4 | 1" | 150 | 150 |
| 1½" | 4 | 1⅛" | 170 | 170 |
| 2" | 8 | 1" | 180 | 180 |
| 2½" | 8 | 1⅛" | 195 | 205 |
| 3" | 8 | 1¼" | 220 | 230 |
| 4" | 8 | 1½" | 255 | 260 |
| 5" | 8 | 1¾" | 300 | 310 |
| 6" | 8 | 2" | 345 | 355 |
| 8" | 12 | 2" | 380 | 395 |
| 10" | 12 | 2½" | 490 | 510 |
| 12" | 12 | 2¾" | 540 | 560 |
- Lengths are in millimetres for a 2 mm raised face (Class 150 and 300) or 7 mm raised face (Class 600 and above), and for ring-joint flanges with the standard ring.
- Stud lengths are those tabulated in ASME B16.5 and do not include the height of the points.
- Different lengths are needed for lap joint flanges, for spectacle blinds or orifice plates in the joint, and when bolt tensioners are used.