MIL-DTL-6193D
1.2.1 Classification. The universal joints are of the following classes and types:
Class 1 - Light duty specification sheet MS20270.
Type A - Square end.
Type B - Round end.
Class 2 - Heavy duty specification sheet MS20271.
Type A - Not applicable.
Type B - Round end.
1.2.2 Size. See table I and the individual specification sheets, specified in 1.2.1.
TABLE I. Class to size designator.
Nominal
Nominal
size of
OD of
Class
Size
universal
universal
(see 1.2.1)
designator
joint
joint
mm
inch
1
6 1/
.375
9.53
1
8
.500
12.70
1
10
.625
15.88
1
12
.750
19.05
1
14 1/
.875
22.23
1
16
1.000
25.40
1
20
1.250
31.75
1
24
1.500
38.10
2
6
.375
9.53
2
8
.500
12.70
2
10
.625
15.88
2
11
.625
15.88
2
12
.750
19.05
2
14
.875
22.23
2
16
1.000
25.40
2
20
1.250
31.75
2
24
1.500
38.10
1/ Type B only.
1.2.3 Plating.
Blank - Cadmium
Z - Zinc
2
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