ANSI B16.5 Class 600 Lap Joint Flanges
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Length Thru Hub (Y) | Hub Diameter (X) | Radius (r) | Bore (B) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Holes |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 3.75 mm | 0.56 mm | 0.88 mm | 1.50 mm | 0.13 mm | 0.90 mm | 2 lb | 2.63 mm | 4 | 0.63 mm |
| 3/4 | 4.63 mm | 0.63 mm | 1.00 mm | 1.88 mm | 0.13 mm | 1.11 mm | 3 lb | 3.25 mm | 4 | 0.75 mm |
| 1 | 4.88 mm | 0.69 mm | 1.06 mm | 2.13 mm | 0.13 mm | 1.38 mm | 4 lb | 3.50 mm | 4 | 0.75 mm |
| 1 1/4 | 5.25 mm | 0.81 mm | 1.13 mm | 2.50 mm | 0.19 mm | 1.72 mm | 5 lb | 3.88 mm | 4 | 0.75 mm |
| 1 1/2 | 6.13 mm | 0.88 mm | 1.25 mm | 2.75 mm | 0.25 mm | 1.97 mm | 7 lb | 4.50 mm | 4 | 0.88 mm |
| 2 | 6.50 mm | 1.00 mm | 1.44 mm | 3.31 mm | 0.31 mm | 2.46 mm | 9 lb | 5.00 mm | 8 | 0.75 mm |
| 2 1/2 | 7.50 mm | 1.13 mm | 1.63 mm | 3.94 mm | 0.31 mm | 2.97 mm | 12 lb | 5.88 mm | 8 | 0.88 mm |
| 3 | 8.25 mm | 1.25 mm | 1.81 mm | 4.63 mm | 0.38 mm | 3.60 mm | 15 lb | 6.63 mm | 8 | 0.88 mm |
| 3 1/2 | 9.00 mm | 1.38 mm | 1.94 mm | 5.25 mm | 0.38 mm | 4.10 mm | 20 lb | 7.25 mm | 8 | 1.00 mm |
| 4 | 10.75 mm | 1.50 mm | 2.13 mm | 6.00 mm | 0.44 mm | 4.60 mm | 36 lb | 8.50 mm | 8 | 1.00 mm |
| 5 | 13.00 mm | 1.75 mm | 2.38 mm | 7.44 mm | 0.44 mm | 5.69 mm | 61 lb | 10.50 mm | 8 | 1.13 mm |
| 6 | 14.00 mm | 1.88 mm | 2.63 mm | 8.75 mm | 0.50 mm | 6.75 mm | 78 lb | 11.50 mm | 12 | 1.13 mm |
| 8 | 16.50 mm | 2.19 mm | 3.00 mm | 10.75 mm | 0.50 mm | 8.75 mm | 110 lb | 13.75 mm | 12 | 1.25 mm |
| 10 | 20.00 mm | 2.50 mm | 4.38 mm | 13.50 mm | 0.50 mm | 10.92 mm | 170 lb | 17.00 mm | 16 | 1.38 mm |
| 12 | 22.00 mm | 2.63 mm | 4.63 mm | 15.75 mm | 0.50 mm | 12.92 mm | 200 lb | 19.25 mm | 20 | 1.38 mm |
| 14 | 23.75 mm | 2.75 mm | 5.00 mm | 17.00 mm | 0.50 mm | 14.18 mm | 250 lb | 20.75 mm | 20 | 1.50 mm |
| 16 | 27.00 mm | 3.00 mm | 5.50 mm | 19.50 mm | 0.50 mm | 16.19 mm | 365 lb | 23.75 mm | 20 | 1.63 mm |
| 18 | 29.25 mm | 3.25 mm | 6.00 mm | 21.50 mm | 0.50 mm | 18.20 mm | 435 lb | 25.75 mm | 20 | 1.75 mm |
| 20 | 32.00 mm | 3.50 mm | 6.50 mm | 24.00 mm | 0.50 mm | 20.25 mm | 570 lb | 28.50 mm | 24 | 1.75 mm |
| 22 | 34.25 mm | 3.75 mm | 6.88 mm | 26.25 mm | 0.50 mm | 22.25 mm | 670 lb | 30.63 mm | 24 | 1.88 mm |
| 24 | 37.00 mm | 4.00 mm | 7.25 mm | 28.25 mm | 0.50 mm | 24.25 mm | 810 lb | 33.00 mm | 24 | 2.00 mm |