ASME B16.5 — Class 900 stud bolts
ASME B16.5 Class 900 stud bolts — 19 sizes.
| NPS | No. of studs | Stud dia — in (in) | Length — Raised face, mm (mm) | Length — Ring joint, mm (mm) |
|---|---|---|---|---|
| ½" | 4 | ¾" | 110 | 110 |
| ¾" | 4 | ¾" | 115 | 115 |
| 1" | 4 | ⅞" | 125 | 125 |
| 1¼" | 4 | ⅞" | 125 | 125 |
| 1½" | 4 | 1" | 140 | 140 |
| 2" | 8 | ⅞" | 145 | 145 |
| 2½" | 8 | 1" | 160 | 160 |
| 3" | 8 | ⅞" | 145 | 145 |
| 4" | 8 | 1⅛" | 170 | 170 |
| 5" | 8 | 1¼" | 190 | 190 |
| 6" | 12 | 1⅛" | 190 | 195 |
| 8" | 12 | 1⅜" | 220 | 220 |
| 10" | 16 | 1⅜" | 235 | 235 |
| 12" | 20 | 1⅜" | 255 | 255 |
| 14" | 20 | 1½" | 275 | 280 |
| 16" | 20 | 1⅝" | 285 | 290 |
| 18" | 20 | 1⅞" | 325 | 335 |
| 20" | 20 | 2" | 350 | 360 |
| 24" | 20 | 2½" | 440 | 455 |
- 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.