Class 15019.6 bar @ 38 °C · Group 1.1
ASME B16.5 Class 150 stud bolt chart
The most common class in any plant. Low pressure, small studs, and the one where a wrong bolt length is most likely to go unnoticed until the joint leaks.
No matching rows.
| NPS | Qty | Stud size | ≈ metric | Bolt circle | Stud length (in) | Stud length (mm) |
|---|---|---|---|---|---|---|
| ½" | 4 | ½" | M12 | 2.38" · 60 mm | 2.25" | 55 |
| ¾" | 4 | ½" | M12 | 2.75" · 70 mm | 2.5" | 65 |
| 1" | 4 | ½" | M12 | 3.12" · 80 mm | 2.5" | 65 |
| 1¼" | 4 | ½" | M12 | 3.5" · 90 mm | 2.75" | 70 |
| 1½" | 4 | ½" | M12 | 3.88" · 100 mm | 2.75" | 70 |
| 2" | 4 | ⅝" | M16 | 4.75" · 120 mm | 3.25" | 85 |
| 2½" | 4 | ⅝" | M16 | 5.5" · 140 mm | 3.5" | 90 |
| 3" | 4 | ⅝" | M16 | 6" · 150 mm | 3.5" | 90 |
| 3½" | 8 | ⅝" | M16 | 7" · 180 mm | 3.5" | 90 |
| 4" | 8 | ⅝" | M16 | 7.5" · 190 mm | 3.5" | 90 |
| 5" | 8 | ¾" | M20 | 8.5" · 215 mm | 4" | 100 |
| 6" | 8 | ¾" | M20 | 9.5" · 240 mm | 4" | 100 |
| 8" | 8 | ¾" | M20 | 11.75" · 300 mm | 4.25" | 110 |
| 10" | 12 | ⅞" | M22 | 14.25" · 360 mm | 4.5" | 115 |
| 12" | 12 | ⅞" | M22 | 17" · 430 mm | 4.75" | 120 |
| 14" | 12 | 1" | M24 | 18.75" · 475 mm | 5.25" | 135 |
| 16" | 16 | 1" | M24 | 21.25" · 540 mm | 5.5" | 140 |
| 18" | 16 | 1⅛" | M27 | 22.75" · 580 mm | 5.75" | 145 |
| 20" | 20 | 1⅛" | M27 | 25" · 635 mm | 6" | 150 |
| 24" | 20 | 1¼" | M30 | 29.5" · 750 mm | 6.5" | 165 |
Need a quotation?
Send us the grade, size and quantity. We reply within one working day with price, lead time and the certificate package included.