Result12" Class 300 flange
Stud size1-1/8"
Wrench size (2H nut)1-13/16"
# of bolts16
Max torque* (ft-lb)583
Bolt hole1-1/4"
Lineup pinFT08
Assembly tools
VTR-1000RP-1000TXU-2
Breakout tools
ImpactTXU-2SQ-3VTR-2000RP-2000
*Max torque is a recommendation only. Do not use it without written approval. All equipment shown is available for rent or purchase.
How to use it
- Pick the pressure class stamped on the flange rim: 150, 300, 400, 600, 900, 1500 or 2500.
- Pick the nominal pipe size. The list only shows sizes that exist in that class.
- Read the joint. Stud size and count tell you what to order. The wrench size is the across-flats of the heavy hex (2H) nut, which is the socket or hex link you need.
- Check the tools. Assembly tools make the joint up. Breakout tools take it apart, and they step up a size because a nut that has been in service takes more to turn than it took to tighten.
Every combination is also in the chart below, so you can scan a whole class at once. Tap a class to open it.
Flange bolt chart by class
192 flange sizes across 7 pressure classes, from ½" to 48". Torque is in ft-lb.
Class 150 flanges 1/2" to 48"
| Pipe size | # of bolts | Stud size | Wrench (2H nut) | Bolt hole | Lineup pin | Max torque* ft-lb | Assembly tools | Breakout tools |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 4 | 1/2" | 7/8" | 5/8" | FT01 | 60 | Hand Torque | Impact, Hand Tools |
| 3/4" | 4 | 1/2" | 7/8" | 5/8" | FT01 | 60 | Hand Torque | Impact, Hand Tools |
| 1" | 4 | 1/2" | 7/8" | 5/8" | FT01 | 60 | Hand Torque | Impact, Hand Tools |
| 1-1/4" | 4 | 1/2" | 7/8" | 5/8" | FT01 | 60 | Hand Torque | Impact, Hand Tools |
| 1-1/2" | 4 | 1/2" | 7/8" | 5/8" | FT01 | 60 | Hand Torque | Impact, Hand Tools |
| 2" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 2-1/2" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 3" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 3-1/2" | 8 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 4" | 8 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 5" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 6" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 8" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 10" | 12 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 12" | 12 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 14" | 12 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 16" | 16 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 18" | 16 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 20" | 20 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 24" | 20 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 26" | 24 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 28" | 28 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 30" | 28 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 32" | 28 | 1-1/2" | 2-3/8" | 1-5/8" | FT16 | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 34" | 32 | 1-1/2" | 2-3/8" | 1-5/8" | FT16 | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 36" | 32 | 1-1/2" | 2-3/8" | 1-5/8" | FT16L | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 38" | 32 | 1-1/2" | 2-3/8" | 1-5/8" | FT16L | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 40" | 36 | 1-1/2" | 2-3/8" | 1-5/8" | FT16L | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 42" | 36 | 1-1/2" | 2-3/8" | 1-5/8" | FT16L | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 44" | 40 | 1-1/2" | 2-3/8" | 1-5/8" | FT16L | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 46" | 40 | 1-1/2" | 2-3/8" | 1-5/8" | FT16L | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 48" | 44 | 1-1/2" | 2-3/8" | 1-5/8" | FT16L | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
Class 300 flanges 1/2" to 48"
| Pipe size | # of bolts | Stud size | Wrench (2H nut) | Bolt hole | Lineup pin | Max torque* ft-lb | Assembly tools | Breakout tools |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 4 | 1/2" | 7/8" | 5/8" | FT01 | 60 | Hand Torque | Impact, Hand Tools |
| 3/4" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | — |
| 1" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 1-1/4" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 1-1/2" | 4 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 2" | 8 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 2-1/2" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 3" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 3-1/2" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 4" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 5" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 6" | 12 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 8" | 12 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 10" | 16 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 12" | 16 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 14" | 20 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 16" | 20 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 18" | 24 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 20" | 24 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 24" | 24 | 1-1/2" | 2-3/8" | 1-5/8" | FT16 | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 26" | 28 | 1-5/8" | 2-9/16" | 1-3/4" | FT1820 | 1,892 | VTR-2000, RP-2000, TXU-4 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 28" | 28 | 1-5/8" | 2-9/16" | 1-3/4" | FT1820 | 1,892 | VTR-2000, RP-2000, TXU-4 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 30" | 28 | 1-3/4" | 2-3/4" | 1-7/8" | FT22 | 2,390 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 32" | 28 | 1-7/8" | 2-15/16" | 2" | FT2426 | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 34" | 28 | 1-7/8" | 2-15/16" | 2" | FT2426 | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 36" | 32 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 38" | 32 | 1-1/2" | 2-3/8" | 1-5/8" | FT16L | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 40" | 32 | 1-5/8" | 2-9/16" | 1-3/4" | FT1820L | 1,892 | VTR-2000, RP-2000, TXU-4 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 42" | 32 | 1-5/8" | 2-9/16" | 1-3/4" | FT1820L | 1,892 | VTR-2000, RP-2000, TXU-4 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 44" | 32 | 1-3/4" | 2-3/4" | 1-7/8" | FT22L | 2,390 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 46" | 28 | 1-7/8" | 2-15/16" | 2" | FT2426L | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 48" | 32 | 1-7/8" | 2-15/16" | 2" | FT2426L | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
Class 400 flanges 1/2" to 48"
| Pipe size | # of bolts | Stud size | Wrench (2H nut) | Bolt hole | Lineup pin | Max torque* ft-lb | Assembly tools | Breakout tools |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 4 | 1/2" | 7/8" | 5/8" | FT01 | 60 | Hand Torque | Impact, Hand Tools |
| 3/4" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 1" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 1-1/4" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 1-1/2" | 4 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 2" | — | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 2-1/2" | — | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 3" | — | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 3-1/2" | — | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 4" | — | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 5" | — | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 6" | — | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 8" | — | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 10" | — | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 12" | — | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 14" | — | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 16" | — | 1-3/8" | 2-3/16" | 1-1/2" | FT14 | 1,112 | VTR-2000, RP-2000, TXU-2 | Impact, TXU-4, SQ-3, VTR-3000, RP-3000 |
| 18" | — | 1-3/8" | 2-3/16" | 1-1/2" | FT14 | 1,112 | VTR-2000, RP-2000, TXU-2 | Impact, TXU-4, SQ-3, VTR-3000, RP-3000 |
| 20" | — | 1-1/2" | 2-3/8" | 1-5/8" | FT16 | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 24" | — | 1-3/4" | 2-3/4" | 1-7/8" | FT22 | 2,390 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 26" | 28 | 1-3/4" | 2-3/4" | 1-7/8" | FT22 | 2,390 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 28" | 28 | 1-7/8" | 2-15/16" | 2" | FT2426 | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 30" | 28 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 32" | 28 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 34" | 28 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 36" | 32 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 38" | 32 | 1-3/4" | 2-3/4" | 1-7/8" | FT22L | 2,390 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 40" | 32 | 1-7/8" | 2-15/16" | 2" | FT2426L | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 42" | 32 | 1-7/8" | 2-15/16" | 2" | FT2426L | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 44" | 32 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 46" | 36 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 48" | 28 | 2-1/4" | 3-1/2" | 2-3/8" | FT34 | 5,250 | TXU-8, SQ-10, RP-6000 | TX-16, SQ-10 |
Class 600 flanges 1/2" to 48"
| Pipe size | # of bolts | Stud size | Wrench (2H nut) | Bolt hole | Lineup pin | Max torque* ft-lb | Assembly tools | Breakout tools |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 4 | 1/2" | 7/8" | 5/8" | FT01 | 60 | Hand Torque | Impact, Hand Tools |
| 3/4" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 1" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 1-1/4" | 4 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 1-1/2" | 4 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 2" | 8 | 5/8" | 1-1/16" | 3/4" | FT02 | 80 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, VT250, Hand Tools |
| 2-1/2" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 3" | 8 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 3-1/2" | 8 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 4" | 8 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 5" | 8 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 6" | 12 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 8" | 12 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 10" | 16 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 12" | 20 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 14" | 20 | 1-3/8" | 2-3/16" | 1-1/2" | FT14 | 1,112 | VTR-2000, RP-2000, TXU-2 | Impact, TXU-4, SQ-3, VTR-3000, RP-3000 |
| 16" | 20 | 1-1/2" | 2-3/8" | 1-5/8" | FT16 | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 18" | 20 | 1-5/8" | 2-9/16" | 1-3/4" | FT1820 | 1,892 | VTR-2000, RP-2000, TXU-4 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 20" | 24 | 1-5/8" | 2-9/16" | 1-3/4" | FT1820 | 1,892 | VTR-2000, RP-2000, TXU-4 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 24" | 24 | 1-7/8" | 2-15/16" | 2" | FT2426 | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 26" | 28 | 1-7/8" | 2-15/16" | 2" | FT2426 | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 28" | 28 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 30" | 28 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 32" | 28 | 2-1/4" | 3-1/2" | 2-3/8" | FT34 | 5,250 | TXU-8, SQ-10, RP-6000 | TX-16, SQ-10 |
| 34" | 28 | 2-1/4" | 3-1/2" | 2-3/8" | FT34 | 5,250 | TXU-8, SQ-10, RP-6000 | TX-16, SQ-10 |
| 36" | 28 | 2-1/2" | 3-7/8" | 2-5/8" | FT3642 | 6,590 | TXU-8, SQ-10 | TX-16, TU-20 |
| 38" | 28 | 2-1/4" | 3-1/2" | 2-3/8" | FT34 | 5,250 | TXU-8, SQ-10, RP-6000 | TX-16, SQ-10 |
| 40" | 32 | 2-1/4" | 3-1/2" | 2-3/8" | FT34 | 5,250 | TXU-8, SQ-10, RP-6000 | TX-16, SQ-10 |
| 42" | 28 | 2-1/2" | 3-7/8" | 2-5/8" | FT3642 | 6,590 | TXU-8, SQ-10 | TX-16, TU-20 |
| 44" | 32 | 2-1/2" | 3-7/8" | 2-5/8" | FT3642L | 6,590 | TXU-8, SQ-10 | TX-16, TU-20 |
| 46" | 32 | 2-1/2" | 3-7/8" | 2-5/8" | FT3642L | 6,590 | TXU-8, SQ-10 | TX-16, TU-20 |
| 48" | 32 | 2-3/4" | 4-1/4" | 2-7/8" | FT48 | 8,854 | TX-16, SQ-10 | TX-16, TU-20 |
Class 900 flanges 1/2" to 48"
| Pipe size | # of bolts | Stud size | Wrench (2H nut) | Bolt hole | Lineup pin | Max torque* ft-lb | Assembly tools | Breakout tools |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 4 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 3/4" | 4 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 1" | 4 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 1-1/4" | 4 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 1-1/2" | 4 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 2" | 8 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 2-1/2" | 8 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 3" | 8 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 4" | 8 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 5" | 8 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 6" | 12 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 8" | 12 | 1-3/8" | 2-3/16" | 1-1/2" | FT14 | 1,112 | VTR-2000, RP-2000, TXU-2 | Impact, TXU-4, SQ-3, VTR-3000, RP-3000 |
| 10" | 16 | 1-3/8" | 2-3/16" | 1-1/2" | FT14 | 1,112 | VTR-2000, RP-2000, TXU-2 | Impact, TXU-4, SQ-3, VTR-3000, RP-3000 |
| 12" | 20 | 1-3/8" | 2-3/16" | 1-1/2" | FT14L | 1,112 | VTR-2000, RP-2000, TXU-2 | Impact, TXU-4, SQ-3, VTR-3000, RP-3000 |
| 14" | 20 | 1-1/2" | 2-3/8" | 1-5/8" | FT16 | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 16" | 20 | 1-5/8" | 2-9/16" | 1-3/4" | FT1820 | 1,892 | VTR-2000, RP-2000, TXU-4 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 18" | 20 | 1-7/8" | 2-15/16" | 2" | FT2426 | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 20" | 20 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 24" | 20 | 2-1/2" | 3-7/8" | 2-5/8" | FT3642 | 6,590 | TXU-8, SQ-10 | TX-16, TU-20 |
| 26" | 20 | 2-3/4" | 4-1/4" | 2-7/8" | FT48 | 8,854 | TX-16, SQ-10 | TX-16, TU-20 |
| 28" | 20 | 3" | 4-5/8" | 3-1/8" | FT5054 | 11,584 | TX-16, TU-20 | TX-32, TU-27 |
| 30" | 20 | 3" | 4-5/8" | 3-1/8" | FT5054 | 11,584 | TX-16, TU-20 | TX-32, TU-27 |
| 32" | 20 | 3-1/4" | 5" | 3-3/8" | — | 14,823 | TX-16, TU-20 | TX-45, TU-27 |
| 34" | 20 | 3-1/2" | 5-3/8" | 3-5/8" | FT60 | 18,617 | TX-32, TU-20 | TX-45, TU-60 |
| 36" | 20 | 3-1/2" | 5-3/8" | 3-5/8" | FT60 | 18,617 | TX-32, TU-20 | TX-45, TU-60 |
| 38" | 20 | 3-1/2" | 5-3/8" | 3-5/8" | FT60 | 18,617 | TX-32, TU-20 | TX-45, TU-60 |
| 40" | 24 | 3-1/2" | 5-3/8" | 3-5/8" | FT60 | 18,617 | TX-32, TU-20 | TX-45, TU-60 |
| 42" | 24 | 3-1/2" | 5-3/8" | 3-5/8" | FT60 | 18,617 | TX-32, TU-20 | TX-45, TU-60 |
| 44" | 24 | 3-1/2" | 5-3/8" | 3-5/8" | — | 18,617 | TX-32, TU-20 | TX-45, TU-60 |
| 46" | 24 | 4" | 6-1/8" | 4-1/8" | — | 28,041 | TX-32, TU-60 | TX-45, TU-60 |
| 48" | 24 | 4" | 6-1/8" | 4-1/8" | — | 28,041 | TX-32, TU-60 | TX-45, TU-60 |
Class 1500 flanges 1/2" to 24"
| Pipe size | # of bolts | Stud size | Wrench (2H nut) | Bolt hole | Lineup pin | Max torque* ft-lb | Assembly tools | Breakout tools |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 4 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 3/4" | 4 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 1" | 4 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 1-1/4" | 4 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 1-1/2" | 4 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 2" | 8 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 2-1/2" | 8 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 3" | 8 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 4" | 8 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 5" | 8 | 1-1/2" | 2-3/8" | 1-5/8" | FT16 | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 6" | 12 | 1-3/8" | 2-3/16" | 1-1/2" | FT14 | 1,112 | VTR-2000, RP-2000, TXU-2 | Impact, TXU-4, SQ-3, VTR-3000, RP-3000 |
| 8" | 12 | 1-5/8" | 2-9/16" | 1-3/4" | FT1820 | 1,892 | VTR-2000, RP-2000, TXU-4 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 10" | 12 | 1-7/8" | 2-15/16" | 2" | FT2426 | 2,969 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-8, SQ-10 |
| 12" | 16 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 14" | 16 | 2-1/4" | 3-1/2" | 2-3/8" | FT34 | 5,250 | TXU-8, SQ-10, RP-6000 | TX-16, SQ-10 |
| 16" | 16 | 2-1/2" | 3-7/8" | 2-5/8" | FT3642 | 6,590 | TXU-8, SQ-10 | TX-16, TU-20 |
| 18" | 16 | 2-3/4" | 4-1/4" | 2-7/8" | FT48 | 8,854 | TX-16, SQ-10 | TX-16, TU-20 |
| 20" | 16 | 3" | 4-5/8" | 3-1/8" | FT5054 | 11,584 | TX-16, TU-20 | TX-32, TU-27 |
| 24" | 16 | 3-1/2" | 5-3/8" | 3-5/8" | FT60 | 18,617 | TX-32, TU-20 | TX-45, TU-60 |
Class 2500 flanges 1/2" to 12"
| Pipe size | # of bolts | Stud size | Wrench (2H nut) | Bolt hole | Lineup pin | Max torque* ft-lb | Assembly tools | Breakout tools |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 4 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 3/4" | 4 | 3/4" | 1-1/4" | 7/8" | FT03 | 165 | VTR-250, Hand Torque, TX-1 | Impact, TX-1, SQ-1, VTR-500, RP-500 |
| 1" | 4 | 7/8" | 1-7/16" | 1" | FT04 | 265 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 1-1/4" | 4 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 1-1/2" | 4 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 2" | 8 | 1" | 1-5/8" | 1-1/8" | FT06 | 397 | VTR-500, RP-500, Hand Torque, TX-1 | Impact, TXU-2, SQ-1, VTR-1000, RP-1000 |
| 2-1/2" | 8 | 1-1/8" | 1-13/16" | 1-1/4" | FT08 | 583 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 3" | 8 | 1-1/4" | 2" | 1-3/8" | FT1012 | 820 | VTR-1000, RP-1000, TXU-2 | Impact, TXU-2, SQ-3, VTR-2000, RP-2000 |
| 4" | 8 | 1-1/2" | 2-3/8" | 1-5/8" | FT16 | 1,468 | VTR-2000, RP-2000, TXU-2 | TXU-4, SQ-5, VTR-3000, RP-3000 |
| 5" | 8 | 1-3/4" | 2-3/4" | 1-7/8" | FT22 | 2,390 | TXU-4, SQ-3, VTR-3000, RP-3000 | TXU-4, SQ-5, VTR-5000, RP-6000 |
| 6" | 8 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 8" | 12 | 2" | 3-1/8" | 2-1/8" | FT30 | 3,635 | TXU-4, SQ-5, VTR-5000, RP-6000 | TXU-8, SQ-10 |
| 10" | 12 | 2-1/2" | 3-7/8" | 2-5/8" | FT3642 | 6,590 | TXU-8, SQ-10 | TX-16, TU-20 |
| 12" | 12 | 2-3/4" | 4-1/4" | 2-7/8" | FT48 | 8,854 | TX-16, SQ-10 | TX-16, TU-20 |
Where the numbers come from
These numbers come from MLC's own flange lookup, the one behind our flange calculator app. Stud sizes, bolt counts and bolt holes follow the standard flange bolting patterns: ASME B16.5 for ½" through 24", and ASME B16.47 above that. B16.47 has two series that bolt up differently, so check whether a large flange is Series A or Series B before you order studs, or call us.
The max torque column is our recommended ceiling for each stud size, not an assembly procedure. Your target torque depends on the gasket, the stud grade, what's on the threads and the bolt stress your joint was designed for. If you need to work one out, use the bolt torque calculator, and tighten in the cross-pattern sequence.
Lineup pins are listed by model. A dash means we don't carry a pin for that size. If a joint won't come together, the flange spreading and alignment guide covers the tools for it.
Every tool in these lists is available to rent or buy. Rentals go out of Gonzales same day or next day. See rentals and service, or call (225) 663-0091.
Frequently asked questions
What size studs does a 2-inch Class 150 flange take?
A 2" Class 150 flange takes 4 studs, 5/8" diameter, with 1-1/16" heavy hex (2H) nuts, so you need a 1-1/16" socket or wrench. Our recommended max torque is 80 ft-lb. That number is a recommendation only. Confirm it against your site procedure and gasket before you use it.
What size studs does a 6-inch Class 150 flange take?
A 6" Class 150 flange takes 8 studs, 3/4" diameter, with 1-1/4" heavy hex (2H) nuts, so you need a 1-1/4" socket or wrench. Our recommended max torque is 165 ft-lb. That number is a recommendation only. Confirm it against your site procedure and gasket before you use it.
What size studs does a 4-inch Class 300 flange take?
A 4" Class 300 flange takes 8 studs, 3/4" diameter, with 1-1/4" heavy hex (2H) nuts, so you need a 1-1/4" socket or wrench. Our recommended max torque is 165 ft-lb. That number is a recommendation only. Confirm it against your site procedure and gasket before you use it.
What size studs does a 12-inch Class 300 flange take?
A 12" Class 300 flange takes 16 studs, 1-1/8" diameter, with 1-13/16" heavy hex (2H) nuts, so you need a 1-13/16" socket or wrench. Our recommended max torque is 583 ft-lb. That number is a recommendation only. Confirm it against your site procedure and gasket before you use it.
What size studs does an 8-inch Class 600 flange take?
A 8" Class 600 flange takes 12 studs, 1-1/8" diameter, with 1-13/16" heavy hex (2H) nuts, so you need a 1-13/16" socket or wrench. Our recommended max torque is 583 ft-lb. That number is a recommendation only. Confirm it against your site procedure and gasket before you use it.
What size studs does a 24-inch Class 900 flange take?
A 24" Class 900 flange takes 20 studs, 2-1/2" diameter, with 3-7/8" heavy hex (2H) nuts, so you need a 3-7/8" socket or wrench. Our recommended max torque is 6,590 ft-lb. That number is a recommendation only. Confirm it against your site procedure and gasket before you use it.
Is the max torque the torque I should tighten to?
No. It is our recommended upper limit for the stud size, not an assembly torque for your joint. The right torque depends on the gasket, the stud material, the lubricant and the target bolt stress, and should come from your site's procedure or a joint engineer per ASME PCC-1. Do not use it without written approval.
Which tool do I need to break out a flange?
Breakout usually takes more torque than make-up, so the breakout list for each size steps up a tool size or adds an impact. Corroded or seized studs can need more than that. Call us with the size, class and access and we'll match the tool.