Construction typeBlockDatum diameter6.6800 in, 169.672 mmMaterialCast ironNumber of grooves4.0000O.D. (in)6.6800 , 169.672 mm
| Construction type | Block |
| Datum diameter | 6.6800 in, 169.672 mm |
| Material | Cast iron |
| Number of grooves | 4.0000 |
| O.D. (in) | 6.6800 , 169.672 mm |