MIL-PRF-87819/1B
Letter
Inches
mm
Design dimension
Tolerances
Design dimension
Tolerances
A
2.300
± 0.015
58.42
+ 12.7 0.0
B
3.700
± 0.015
93.98
± 0.381
C
0.500
± 0.015
12.7
± 0.381
D
0.250
± 0.015
6.35
± 0.381
E
0.600
± 0.015
15.24
± 0.381
NOTES:
1. Dimensions are in inches. Unless otherwise specified, tolerance is ± 0.015 inch. Metric equivalents
are given for information only.
2. All shield and shield-cushion dimensions shall enable the part to provide comfortable wear and
acoustic noise-protection under the temperature, work-shift, and noise-conditions encountered, and
when used by a user with a standard jaw size (50th percentile, male aviator).
3. Foam acoustic filler shall be provided as specified (see Requirements).
4. Mounting method for microphone shall conform to Requirements; mounting shown optional.
FIGURE 2. Microphone protective shield assembly Continued.
FIGURE 3. Microphone strap assembly, typical configuration.
3
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