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Find AWWA Class D Overbore Flanges at API International, Inc. These Overbore Flanges are AWWA Class #150, with AWWA Class #300 available upon request.
Downloads:
| API Part Number | I.D. | O.D. | THK | B.H.C. | B.H.C. Dia. | # of Bolts | Material |
| PFOB1400-1613-D | 16.13 | 21.00 | 0.938 | 18.75 | 1.125 | 12 | C207-13 |
| PFOB1600-1813-D | 18.13 | 23.50 | 1.000 | 21.25 | 1.130 | 16 | C207-13 |
| PFOB1800-1988-D | 19.88 | 25.00 | 1.060 | 22.75 | 1.250 | 16 | C207-13 |
| PFOB1800-2013-D | 20.13 | 25.00 | 1.060 | 22.75 | 1.250 | 16 | C207-13 |
| PFOB2000-2188-D | 21.88 | 27.50 | 1.130 | 25.00 | 1.250 | 20 | C207-13 |
| PFOB2400-2588-D-A105 | 25.88 | 32.00 | 1.250 | 29.50 | 1.375 | 20 | ASTM A105 |
| PFOB2400-2588-D-A36 | 25.88 | 32.00 | 1.250 | 29.50 | 1.380 | 20 | A36 |
| PFOB2400-2613-D-A105 | 26.13 | 32.00 | 1.250 | 29.50 | 1.375 | 20 | ASTM A105 |
| PFOB3000-3200-D-A105 | 32.00 | 38.75 | 1.380 | 36.00 | 1.380 | 28 | ASTM A105 |
| PFOB3600-3800-D-A105 | 38.00 | 46.00 | 1.630 | 42.75 | 1.630 | 32 | ASTM A105 |
| PFOB4200-4400-D-A105 | 44.00 | 53.00 | 1.750 | 49.50 | 1.630 | 26 | ASTM A105 |
| PFOB4800-5000-D-A105 | 50.00 | 59.50 | 1.880 | 56.00 | 1.630 | 44 | ASTM A105 |
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