Construction typeArmDatum diameter4.7800 in, 121.412 mmMaterialCast ironNumber of grooves1.0000O.D. (in)4.9300 , 125.222 mm
| Construction type | Arm |
| Datum diameter | 4.7800 in, 121.412 mm |
| Material | Cast iron |
| Number of grooves | 1.0000 |
| O.D. (in) | 4.9300 , 125.222 mm |