Construction typeBlockDatum diameter20.2800 in, 515.112 mmMaterialCast ironNumber of grooves4.0000O.D. (in)20.2800 , 515.112 mm
| Construction type | Block |
| Datum diameter | 20.2800 in, 515.112 mm |
| Material | Cast iron |
| Number of grooves | 4.0000 |
| O.D. (in) | 20.2800 , 515.112 mm |