Construction typeArmDatum diameter7.7800 in, 197.612 mmMaterialCast ironNumber of grooves1.0000O.D. (in)7.9300 , 201.422 mm
| Construction type | Arm |
| Datum diameter | 7.7800 in, 197.612 mm |
| Material | Cast iron |
| Number of grooves | 1.0000 |
| O.D. (in) | 7.9300 , 201.422 mm |