| NPS | Bolt Circle Dia. | Bolt Hole Size | Dia. of Bolts | Dia. of Hub C Min | Length of Threads C Min. | Length of Bolts | Number of Bolt Holes | Outside Flange Dia. A | Overall Length B Min. | Thickness of Flange D Min |
|---|---|---|---|---|---|---|---|---|---|---|
| 4 | 6.56 | 0.69 | 0.63 | 4.94 | --- | 2.50 | 5.00 | 7.81 | 1.38 | 0.69 |
