MIL-PRF-1/21D
DIMENSIONS
Inches
Millimeters
LTR
Min
Max
Min
Max
Notes
Qualification inspection
A
2.609
2.984
66.27
75.79
B
.313
7.95
K
.008
.20
L
.032
.81
Conformance inspection, part 1
C
2.297
2.672
58.34
67.87
D
.906
.969
23.01
24.61
E
.656
.781
16.66
19.84
F
.047
1.19
3, 4
Conformance inspection, part 2
G
1.109
1.141
28.17
28.98
H
.688
.813
17.48
20.65
J
.185
.189
4.70
4.80
1
M
.220
5.59
N
.246
.254
6.25
6.45
P
.896
.930
22.76
23.62
2
NOTES:
1/ The H-F electrode shall be concentric with the disc electrode within .018(.46 mm).
2/ The base shall be concentric with the disc electrode within .040(1.02 mm).
3/ Contact disc external surfaces and H-F electrode shall be gold plated min 10 msi or
silver plated 15 msi on external surfaces (edges of disc need not be plated).
4/ Contact portion of disc measured radially which shall be free from splits or tears, shall
be smooth and shall be perceptibly flat.
4
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