MIL-PRF-1/26E
DIMENSIONS
INCHES
MILLIMETERS
Ltr
Min
Max
Min
Max
Qualification inspection
E
0.255
6.48
F
0.083
0.103
2.11
2.62
G
1.75
44.45
J
1.063
27.00
Conformance inspection, part 1
H
1.545
1.565
39.24
39.75
Conformance inspection, part 2
A
No.8-32
UNC-2B - 4 holes
B
0.608
0.612
15.44
15.54
C
0.638
0.642
16.21
16.31
D
1.375
34.93
NOTES:
1. Exhaust tube shall not extend beyond flanges more than 0.25 (6.35 mm).
2. Silver plate 100 MSI, or equivalent.
3. End flanges shall be parallel planes flat within 0.006 (0.15 mm) when measured within the area between concentric
circles of 1.25 in (31.75 mm) and 1.56 in (39.62 mm) diameter. The area outside of 1.56 in (39.62 mm) diameter may
measure less than the minimum measured dimension but shall not measure more than 0.001 in (0.03 mm) above the
maximum measured dimension.
FIGURE 1. Outline drawing of electron tube type 1B63A.
4
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