The following identification codes are used to specify the location of cushions, cushion adjustments, side ports, mountings, or other special requirements.
| MS1 | Front surface or face - bearing cap side |
| MS2 | Bottom surface - opposite keyway when actuator is a mid-rotation (applies to standard keyway location only). |
| MS3 | Back surface - opposit of bearing cap side |
| MS4 | Top surface - opposite bottom surface. |
Cylinder ends are numerically identified as shown below. the left cylinder end is No. 1 and the right cylinder end is No. 2 when looking at ther front face with the keyway at 12 o'clock and the rotary actuator at mid-rotation.
Standard and optional port configuration for Ohio Oscillator pneumatic rotary actuators.
| Model | Standard NPT Port | Optional SAE Port in Dia. x Thd./in |
Recommended Tube Size In O.D. | External Stroke Adjusters | Side Port | ||
| Maximum NPT | Port Size SAE | Maximum NPT | Port Size SAE | ||||
| A6.2 | 1/4 | 9/16-18 | 3/8 | 1/4" | 7/16"-20 | Consult Factory | |
| A6.3 | 1/4 | 9/16-18 | 3/8 | ||||
| A19.3 | 1/4 | 9/16-18 | 3/8 | ||||
| A19.4 | 3/8 | 3/4-16 | 1/2 | ||||
| A67.4 | 3/8 | 3/4-16 | 1/2 | ||||
| A67.6 | 1/2 | 7/8-14 | 5/8 | ||||
| A250.6 | 3/4 | 1-1/16-12 | 3/4 | Consult Factory for optional sizes | |||
| A250.8 | 3/4 | 1-1/16-12 | 3/4 | ||||
| A250.10 | 1 | 1-5/8-12 | 1-1/4 | ||||