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
a
---
---
---
---
---
---
22.5
b
---
---
---
---
---
---
45
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 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 only 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 (31.75 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 these 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. The numbers indicated above each base drawing refer to the Group Number of Pin and
Index Guide Dimensional Limits.
FIGURE 4. Case and mounting dimensions for SA, SB, and SY (continued).
10
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