Class 2500 Long Weld Neck Flange Dimensions
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| Size in Inch | Size in mm | Outer Dia. | Flange Thick. | Hub OD | Weld Neck OD | RF Dia. | RF Height | PCD | Hub Length | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | E | F | G | H | |||||||
| 1/2 | 15 | 135 | 30.2 | 43 | 21.3 | 34.9 | 7 | 88.9 | as per requirement | 4 | 3/4 | 120 | 7/8 | M20 |
| 3/4 | 20 | 140 | 31.8 | 51 | 26.7 | 42.9 | 7 | 95.2 | as per requirement | 4 | 3/4 | 125 | 7/8 | M20 |
| 1 | 25 | 160 | 35 | 57 | 33.4 | 50.8 | 7 | 108 | as per requirement | 4 | 7/8 | 140 | 1 | M24 |
| 1 1/4 | 32 | 185 | 38.1 | 73 | 42.2 | 63.5 | 7 | 130.2 | as per requirement | 4 | 1 | 150 | 1 1/8 | M27 |
| 1 1/2 | 40 | 205 | 44.5 | 79 | 48.3 | 73 | 7 | 146 | as per requirement | 4 | 1 1/8 | 170 | 1 1/4 | M30 |
| 2 | 50 | 235 | 50.9 | 95 | 60.3 | 92.1 | 7 | 171.4 | as per requirement | 8 | 1 | 180 | 1 1/8 | M27 |
| 2 1/2 | 65 | 265 | 57.2 | 114 | 73 | 104.8 | 7 | 196.8 | as per requirement | 8 | 1 1/8 | 195 | 1 1/4 | M30 |
| 3 | 80 | 305 | 66.7 | 133 | 88.9 | 127 | 7 | 228.6 | as per requirement | 8 | 1 1/4 | 220 | 1 3/8 | M33 |
| 4 | 100 | 355 | 76.2 | 165 | 114.3 | 157.2 | 7 | 273 | as per requirement | 8 | 1 1/2 | 255 | 1 5/8 | M39 |
| 5 | 125 | 420 | 92.1 | 203 | 141.3 | 185.7 | 7 | 323.8 | as per requirement | 8 | 1 3/4 | 300 | 1 7/8 | M45 |
| 6 | 150 | 485 | 108 | 235 | 168.3 | 215.9 | 7 | 368.3 | as per requirement | 8 | 2 | 345 | 2 1/8 | M52 |
| 8 | 200 | 550 | 127 | 305 | 219.1 | 269.9 | 7 | 438.2 | as per requirement | 12 | 2 | 380 | 2 1/8 | M52 |
| 10 | 250 | 675 | 165.1 | 375 | 273 | 323.8 | 7 | 539.8 | as per requirement | 12 | 2 1/2 | 490 | 2 5/8 | M64 |
| 12 | 300 | 760 | 184.2 | 441 | 323.8 | 381 | 7 | 619.1 | as per requirement | 12 | 2 3/4 | 540 | 2 7/8 | M72 |