Industry Standard Class 300 Series A Slip-On Bolting Matches
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Raised Face Diameter (R) | Length Thru Hub (Y) | Hub Diameter (X) | Minimum Fillet Radius (r) | Bore (B) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 26 | 38.25 mm | 3.12 mm | 29.50 mm | 5.37 mm | 30.25 mm | 0.38 mm | 26.25 mm | 595 lb | 34.50 mm | 28 | 1.75 mm |
| 28 | 40.75 mm | 3.38 mm | 31.50 mm | 5.68 mm | 32.75 mm | 0.44 mm | 28.25 mm | 729 lb | 37.00 mm | 28 | 1.75 mm |
| 30 | 43.00 mm | 3.62 mm | 33.75 mm | 6.12 mm | 34.75 mm | 0.44 mm | 30.25 mm | 840 lb | 39.25 mm | 28 | 1.88 mm |
| 32 | 45.25 mm | 3.88 mm | 36.00 mm | 6.56 mm | 36.75 mm | 0.44 mm | 32.25 mm | 964 lb | 41.50 mm | 28 | 2.00 mm |
| 34 | 47.50 mm | 4.00 mm | 38.00 mm | 6.81 mm | 38.75 mm | 0.50 mm | 34.25 mm | 1076 lb | 43.50 mm | 28 | 2.00 mm |
| 36 | 50.00 mm | 4.12 mm | 40.25 mm | 7.06 mm | 41.00 mm | 0.50 mm | 36.25 mm | 1202 lb | 46.00 mm | 32 | 2.12 mm |
| 38 | 46.00 mm | 5.31 mm | 40.50 mm | 6.06 mm | 39.00 mm | 0.50 mm | 38.25 mm | 687 lb | 43.00 mm | 32 | 1.62 mm |
| 40 | 48.75 mm | 5.56 mm | 42.75 mm | 6.56 mm | 41.25 mm | 0.50 mm | 40.25 mm | 840 lb | 45.50 mm | 32 | 1.75 mm |
| 42 | 50.75 mm | 5.81 mm | 44.75 mm | 6.81 mm | 43.25 mm | 0.50 mm | 42.25 mm | 922 lb | 47.50 mm | 32 | 1.75 mm |
| 44 | 53.25 mm | 6.06 mm | 47.00 mm | 6.86 mm | 45.25 mm | 0.50 mm | 44.25 mm | 1055 lb | 49.75 mm | 32 | 1.88 mm |
| 46 | 55.75 mm | 6.31 mm | 49.00 mm | 7.06 mm | 47.25 mm | 0.50 mm | 46.25 mm | 1205 lb | 52.00 mm | 28 | 2.00 mm |
| 48 | 57.75 mm | 6.56 mm | 51.25 mm | 7.18 mm | 49.25 mm | 0.50 mm | 48.25 mm | 1306 lb | 54.00 mm | 32 | 2.00 mm |