MIL-DTL-27189E
3.9 Dial. The dial shall conform to figure 1 and shall be of material suitable for integral lighting. A minimum
diameter of 1.75 inches shall be maintained across the outside of the graduations. The graduation for 45 psi shall be
located on the horizontal centerline at the left side of the dial.
3.9.1 Markings.
3.9.1.1 White. The following markings shall be finished in durable white in accordance with FED-STD-595, color
No. 37875. The dimensions shall be as specified.
Width of Line
Height or Length
or Graduation
Inch +0.016
Inch +0.005
Numerals 0, 20, 40, 60, 80, and 100
0.157
0.025
10-pound graduations
0.188
0.031
5-pound graduations
0.094
0.020
Lettering OIL PRESS
0.125
0.025
Lettering PSI
0.125
0.025
3.9.1.2 Black. The markings USAF and MS24576 (*) (applicable dash No.) shall be permanently and legibly
marked on the mask in letters 0.062 inch in height. Unless otherwise specified, these, all other markings, and
backgrounds shall be finished in durable dull black in accordance with FED-STD-595, color No. 37038.
3.10 Electrical connector. The indicator shall be provided with an electrical connector, Deutsch Company part No.
DM5600-7P, or equal, to mate with Deutsch Company part No. DM9700-7S, or equal. The connector shall be
furnished with a cap or cover and gasket to prevent penetration of water vapor.
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