MIL-PRF-1/1658C
G
W
Lead
Lug designation
Inches
Millimeters
Inches
Millimeters
Min
Max
Min
Max
Max
Max
Reservoir, Grid
#10
0.187
0.207
4.75
5.26
0.395
10.03
Heater
0.250
0.260
0.313
6.60
7.95
0.605
15.37
A
X
T
Lead
Lug designation
Inches
Millimeters
Inches
Millimeters
Inches
Millimeters
Max
Max
Min
Min
Max
Max
Reservoir, Grid
#10
0.200
5.08
0.275
6.99
0.060
1.52
Heater
0.250
0.305
7.75
0.380
9.65
0.060
1.52
NOTES:
1. Dimensions are in inches.
2. Metric equivalents (to the nearest 0.01 mm) are given for general information only and are based upon
1 inch = 25.4 mm.
3. There shall be no obstruction within the distance X from the center of the lug screw hole.
4. Lugs or terminals shall be permanently marked as follows:
H (heater)
G (grid)
R (reservoir)
FIGURE 2. Pressure type terminal lugs with insulating sleeves.
11
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