Class 600102.1 bar @ 38 °C · Group 1.1
ASME B16.5 Class 600 stud bolt chart
Where studs start getting long enough that thread engagement and nut runout matter. Class 400 flanges up to NPS 3 use this same bolting.
No matching rows.
| NPS | Qty | Stud size | ≈ metric | Bolt circle | Stud length (in) | Stud length (mm) |
|---|---|---|---|---|---|---|
| ½" | 4 | ½" | M12 | 2.62" · 65 mm | 2.5" | 65 |
| ¾" | 4 | ⅝" | M16 | 3.25" · 85 mm | 3" | 75 |
| 1" | 4 | ⅝" | M16 | 3.5" · 90 mm | 3.25" | 85 |
| 1¼" | 4 | ⅝" | M16 | 3.88" · 100 mm | 3.25" | 85 |
| 1½" | 4 | ¾" | M20 | 4.5" · 115 mm | 3.75" | 95 |
| 2" | 8 | ⅝" | M16 | 5" · 125 mm | 3.75" | 95 |
| 2½" | 8 | ¾" | M20 | 5.88" · 150 mm | 4.25" | 110 |
| 3" | 8 | ¾" | M20 | 6.62" · 170 mm | 4.25" | 110 |
| 4" | 8 | ⅞" | M22 | 8.5" · 215 mm | 5" | 125 |
| 5" | 8 | 1" | M24 | 10.5" · 265 mm | 5.75" | 145 |
| 6" | 12 | 1" | M24 | 11.5" · 290 mm | 5.75" | 145 |
| 8" | 12 | 1⅛" | M27 | 13.75" · 350 mm | 6.5" | 165 |
| 10" | 16 | 1¼" | M30 | 17" · 430 mm | 7.25" | 185 |
| 12" | 20 | 1¼" | M30 | 19.25" · 490 mm | 7.5" | 190 |
| 14" | 20 | 1⅜" | M33 | 20.75" · 525 mm | 8.25" | 210 |
| 16" | 20 | 1½" | M36 | 23.75" · 605 mm | 9" | 230 |
| 18" | 20 | 1⅝" | M39 | 25.75" · 655 mm | 9.75" | 250 |
| 20" | 24 | 1⅝" | M39 | 28.5" · 725 mm | 10.25" | 260 |
| 24" | 24 | 1⅞" | M45 | 33" · 840 mm | 11.5" | 290 |
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