| KNOB PURPOSE | FOR SETTING BAROMETRIC SCALE |
| KNOB QUANTITY | 1 |
| OVERALL DEPTH | 5.500 INCHES NOMINAL |
| OVERALL DIAMETER | 3.250 INCHES NOMINAL |
| MECHANICAL CONNECTION QUANTITY | 1 |
| MECHANICAL CONNECTION SIZE | 1-8 IN. |
| MECHANICAL CONNECTION TYPE | INTERNAL PIPE |
| MOUNTING METHOD | THREADED BEZEL |
| NONDEFINITIVE SPEC/STD DATA | AAU-8/A TYPE |
| POINTER FINISH | FLUORESCENT |
| POINTER QUANTITY | 4 |
| SCALE NAME | ALTITUDE AND BAROMETRIC PRESSURE |
| SCALE QUANTITY | 4 |
| SCALE MARKING TRANSPARENCY | FLUORESCENT |
| SCALE MARKING | LETTERS AND NUMERALS AND LINED INCREMENTS |
| SCALE SMALLEST INCREMENT GRADUATION | 20 FT,200 FT,2000 FT,0.02 IN. |