| OVERALL DEPTH | 4.875 INCHES NOMINAL |
| OVERALL HEIGHT | 3.250 INCHES NOMINAL |
| OVERALL WIDTH | 3.250 INCHES NOMINAL |
| MECHANICAL CONNECTION QUANTITY | 1 |
| MECHANICAL CONNECTION SIZE | 1/8 IN. |
| MECHANICAL CONNECTION TYPE | INTERNAL PIPE |
| MOUNTING METHOD | THREADED BEZEL |
| NONLUMINOUS SCALE MARKING AND COLOR | LETTERS WHITE AND NUMERALS WHITE AND LINED INCREMENTS WHITE |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | MODIFIED IN ACCORDANCE WITH BUAER DWG 55A12A1 AND NAVY AIRCRAFT BULLETIN 259 TO REPLIES TMRB,TMRC,TMRD AND TMRG |
| SCALE MARKING AND SURFACE FINISH | LETTERS NONLUMINOUS AND NUMERALS NONLUMINOUS AND LINED INCREMENTS NONLUMINOUS |
| SCALE QUANTITY | 2 |
| SCALE NAME | ALTITUDE AND BAROMETRIC PRESSURE |
| SCALE SMALLEST INCREMENT GRADUATION | FT20.000,INCHES OF MERCURY0.020 |