Industry Standard Class 350 Slip-On Flanges
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Raised Face Diameter (R) | Length Thru Hub (Y) | Base of Hub Diameter (X) | Bore (B) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|
| 26 | 32.75 mm | 2.50 mm | 29.50 mm | 4.50 mm | 27.88 mm | 26.25 mm | 225 lb | 30.63 mm | 28 | 1.13 mm |
| 28 | 34.75 mm | 2.50 mm | 31.50 mm | 4.50 mm | 29.88 mm | 28.25 mm | 250 lb | 32.63 mm | 28 | 1.13 mm |
| 30 | 37.00 mm | 2.63 mm | 33.75 mm | 4.75 mm | 32.13 mm | 30.25 mm | 295 lb | 34.88 mm | 32 | 1.13 mm |
| 32 | 39.00 mm | 2.75 mm | 35.75 mm | 5.00 mm | 34.13 mm | 32.25 mm | 325 lb | 36.88 mm | 36 | 1.13 mm |
| 34 | 41.00 mm | 2.88 mm | 37.75 mm | 5.13 mm | 36.13 mm | 34.25 mm | 355 lb | 38.88 mm | 40 | 1.13 mm |
| 36 | 43.75 mm | 3.13 mm | 40.25 mm | 5.63 mm | 38.50 mm | 36.25 mm | 465 lb | 41.50 mm | 40 | 1.25 mm |
| 38 | 45.75 mm | 3.13 mm | 42.25 mm | 5.63 mm | 40.50 mm | 38.25 mm | 490 lb | 43.50 mm | 40 | 1.25 mm |
| 40 | 47.75 mm | 3.25 mm | 44.25 mm | 5.88 mm | 42.50 mm | 40.25 mm | 530 lb | 45.50 mm | 44 | 1.25 mm |
| 42 | 50.00 mm | 3.50 mm | 46.50 mm | 6.13 mm | 44.75 mm | 42.25 mm | 620 lb | 47.75 mm | 48 | 1.25 mm |
| 44 | 52.75 mm | 3.75 mm | 48.88 mm | 6.75 mm | 46.75 mm | 44.25 mm | 760 lb | 50.25 mm | 44 | 1.38 mm |
| 46 | 54.75 mm | 4.25 mm | 50.88 mm | 7.25 mm | 48.75 mm | 46.25 mm | 880 lb | 52.25 mm | 48 | 1.38 mm |
| 48 | 56.75 mm | 4.25 mm | 52.88 mm | 7.25 mm | 50.75 mm | 48.25 mm | 920 lb | 54.25 mm | 48 | 1.38 mm |
| 54 | 63.50 mm | 4.75 mm | 59.25 mm | 8.25 mm | 57.00 mm | 54.25 mm | 1150 lb | 60.75 mm | 52 | 1.50 mm |
| 60 | 69.50 mm | 5.00 mm | 65.25 mm | 8.50 mm | 63.00 mm | 60.25 mm | 1450 lb | 66.75 mm | 60 | 1.50 mm |