Class 1500 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 | 120 | 22.3 | 38 | 21.3 | 34.9 | 7 | 82.6 | as per requirement | 4 | 3/4 | 110 | 7/8 | M20 |
| 3/4 | 20 | 130 | 25.4 | 44 | 26.7 | 42.9 | 7 | 88.9 | as per requirement | 4 | 3/4 | 115 | 7/8 | M20 |
| 1 | 25 | 150 | 28.6 | 52 | 33.4 | 50.8 | 7 | 101.6 | as per requirement | 4 | 7/8 | 125 | 1 | M24 |
| 1 1/4 | 32 | 160 | 28.6 | 64 | 42.2 | 63.5 | 7 | 111.1 | as per requirement | 4 | 7/8 | 125 | 1 | M24 |
| 1 1/2 | 40 | 180 | 31.8 | 70 | 48.3 | 73 | 7 | 123.8 | as per requirement | 4 | 1 | 140 | 1 1/8 | M27 |
| 2 | 50 | 215 | 38.1 | 105 | 60.3 | 92.1 | 7 | 165.1 | as per requirement | 8 | 7/8 | 145 | 1 | M24 |
| 2 1/2 | 65 | 245 | 41.3 | 124 | 73 | 104.8 | 7 | 190.5 | as per requirement | 8 | 1 | 160 | 1 1/8 | M27 |
| 3 | 80 | 265 | 47.7 | 133 | 88.9 | 127 | 7 | 203.2 | as per requirement | 8 | 1 1/8 | 180 | 1 1/4 | M30 |
| 4 | 100 | 310 | 54 | 162 | 114.3 | 157.2 | 7 | 241.3 | as per requirement | 8 | 1 1/4 | 195 | 1 3/8 | M33 |
| 5 | 125 | 375 | 73.1 | 197 | 141.3 | 185.7 | 7 | 292.1 | as per requirement | 8 | 1 1/2 | 250 | 1 5/8 | M39 |
| 6 | 150 | 395 | 82.6 | 229 | 168.3 | 215.9 | 7 | 317.5 | as per requirement | 12 | 1 3/8 | 260 | 1 1/2 | M36 |
| 8 | 200 | 485 | 92.1 | 292 | 219.1 | 269.9 | 7 | 393.7 | as per requirement | 12 | 1 5/8 | 290 | 1 3/4 | M42 |
| 10 | 250 | 585 | 108 | 368 | 273 | 323.8 | 7 | 482.6 | as per requirement | 12 | 1 7/8 | 335 | 2 | M48 |
| 12 | 300 | 675 | 123.9 | 451 | 323.8 | 381 | 7 | 571.5 | as per requirement | 16 | 2 | 375 | 2 1/8 | M52 |
| 14 | 350 | 750 | 133.4 | 495 | 355.6 | 412.8 | 7 | 635 | as per requirement | 16 | 2 1/4 | 405 | 2 3/8 | M56 |
| 16 | 400 | 825 | 146.1 | 552 | 406.4 | 469.9 | 7 | 704.8 | as per requirement | 16 | 2 1/2 | 445 | 2 5/8 | M64 |
| 18 | 450 | 915 | 162 | 597 | 457 | 533.4 | 7 | 774.7 | as per requirement | 16 | 2 3/4 | 495 | 2 7/8 | M72 |
| 20 | 500 | 985 | 177.8 | 641 | 508 | 584.2 | 7 | 831.8 | as per requirement | 16 | 3 | 540 | 3 1/8 | M76 |
| 24 | 600 | 1170 | 203.2 | 762 | 610 | 692.2 | 7 | 990.6 | as per requirement | 16 | 3 1/2 | 615 | 3 5/8 | M90 |