MIL-F-18327F
Ref
Degrees
Notes
Inches
Millimeters
Min
Nom
Max
Min
Nom
Max
A
---
.687
---
---
17.45
---
5
B
.090
.093
.096
2.286
2.362
2.438
J
.320
---
---
8.13
---
---
6
L
.427
.437
.447
10.85
11.10
11.35
M
---
---
.135
---
---
3.42
N
---
---
.050
---
---
1.27
P
.550
.560
.570
13.97
14.22
14.47
7
Q
.490
.500
.510
12.45
12.70
12.95
R1
---
.031r
---
---
0.79r
---
R2
---
---
.050r
---
---
1.27r
R3
---
.040r
---
---
1.02r
---
S
.040
.047
.055
1.02
1.19
1.39
U1
.305
.312
.317
7.75
7.92
8.05
U2
.300
.308
.315
7.62
7.82
8.00
V1
.352
.362
.372
8.95
9.19
9.44
V2
.343
.353
.363
8.72
8.97
9.22
W1
.085
.090
.095
2.159
2.286
2.413
W2
.075
.080
.085
1.905
2.032
2.159
22.5
a
---
---
---
---
---
---
45
b
---
---
---
---
---
---
For the purpose of establishing interchangeability, the dimensional limits given here
are standard for the orientation of base pins and index guide of Group No. 1 bases.
(Formerly known as Octal Bases.)
The vertical dimensions are referred to the underside of a base as differentiated from
the general practice in this standard of dimensioning from the outer rim.
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are given for general information only.
3. Dimensions fixing the contact pin positions refer to their fixed ends and are given for information only. Pin
positions may be checked by means of alignment gauge No. GB8-1 in accordance with EIA Standard RS-
209-A. For bases with coaxial lead, use gauge GB8-1 with pin 4 pin hole, .1600 ± .0005 (4.064 ± 0.013
mm) diameter to a depth of 1.25 (31.8 mm) minimum.
4. Underside of base.
5. Dimension B does not include increase in pin diameter due to solder.
6. Dimension L may be increased by .030 (0.76 mm) maximum for solder.
7. Any projection on the under-surface of the base other than those shown, such as a rim or external barriers,
have a height not exceeding .045 (1.14 mm).
8. Pin numbering is viewed from the pin ends. The drawing shows the numbering of the pins as seen from
their free ends.
9. External mounting support required for plug in type filters having no means of support other than socket.
10. The numbers indicated above each base drawing refer to the Group Number of Pin and Index Guide
Dimensional Limits.
FIGURE 2. Case and mounting dimensions for PA, PB, PC, PY, and PZ - Continued.
7
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