Construction typeArmDatum diameter11.7800 in, 299.212 mmMaterialCast ironNumber of grooves1.0000O.D. (in)11.9300 , 303.022 mm
| Construction type | Arm |
| Datum diameter | 11.7800 in, 299.212 mm |
| Material | Cast iron |
| Number of grooves | 1.0000 |
| O.D. (in) | 11.9300 , 303.022 mm |